Database
MCQS
A. Structured Language
B. Standard Query Language
C. Sequential Query Language
D. Simple Question Language
SQL stands for Standard Query Language.
A. SELECT * FROM employees;
B. SELECT ALL FROM employees;
C. SHOW COLUMNS FROM employees;
D. DISPLAY employees;
'SELECT * FROM employees;' selects all columns from the "employees" table.
A. Specify the columns to be selected
B. Filter rows based on a condition
C. Sort the result set
D. Join multiple tables
The WHERE clause is used to filter rows based on a condition.
A. UPDATE
B. MODIFY
C. CHANGE
D. SET
The UPDATE command is used to modify data in a table.
A. Filter rows
B. Group rows
C. Sort the result set
D. Combine tables
The ORDER BY clause is used to sort the result set.
A. VARCHAR
B. CHAR
C. TEXT
D. BLOB
'CHAR' is used for fixed-length strings in MySQL.
A. Ascending
B. Descending
C. Random
D. Alphabetical
The default sorting order is ascending in SQL.
A. COUNT()
B. TOTAL()
C. SUM()
D. ROWCOUNT()
'COUNT()' is used to find the total number of rows in a table.
A. Filter rows
B. Sort the result set
C. Combine rows into groups
D. Join multiple tables
The GROUP BY clause is used to combine rows into groups based on a column.
A. DELETE FROM table;
B. REMOVE * FROM table;
C. TRUNCATE TABLE table;
D. DROP TABLE table;
'TRUNCATE TABLE table;' removes all records from a table in MySQL.
A. Combines rows from two or more tables
B. Retrieves all rows from a table
C. Retrieves rows that have no matching rows in the other table
D. Excludes specified rows
INNER JOIN combines rows from two or more tables based on a related column.
A. INSERT INTO
B. ADD DATA
C. UPDATE DATA
D. ADD INTO
'INSERT INTO' is used to insert new data into a table.
A. PRIMARY KEY
B. UNIQUE
C. FULLTEXT
D. INDEX
'UNIQUE' indexes allow only unique values, and nulls are considered distinct.
A. Filter rows
B. Sort the result set
C. Filter groups
D. Combine rows into groups
The HAVING clause is used to filter groups based on a condition.
A. DESCRIBE
B. SHOW TABLE
C. DISPLAY TABLE
D. INFO TABLE
'DESCRIBE' is used to retrieve the definition of a table.
A. 255
B. 512
C. 1024
D. It varies based on the version
The maximum length of VARCHAR is 255 characters in MySQL.
A. ALLOW PRIVILEGES
B. GRANT PRIVILEGES
C. GRANT
D. ALLOW ACCESS
'GRANT' is used to grant specific privileges to a user in MySQL.
A. Filter rows
B. Sort the result set
C. Limit the number of rows returned
D. Join multiple tables
The LIMIT clause is used to limit the number of rows returned in the result set.
A. MAX()
B. HIGH()
C. TOP()
D. HIGHEST()
'MAX()' is used to find the highest value in a column.
A. Sort the result set
B. Filter rows
C. Eliminate duplicate values
D. Combine rows into groups
'DISTINCT' is used to eliminate duplicate values in the result set.
A. MyISAM
B. InnoDB
C. MEMORY
D. ARCHIVE
'InnoDB' is a storage engine that supports transactions and ACID properties.
A. MODIFY
B. CHANGE
C. UPDATE
D. SET
'UPDATE' is used to change the value of an existing record in a table.
A. Allows NULL values
B. Prevents NULL values
C. Sorts values in descending order
D. Groups values
The NOT NULL constraint prevents NULL values in a column.
A. DELETE DATABASE
B. DROP DATABASE
C. REMOVE DATABASE
D. DESTROY DATABASE
'DROP DATABASE' is used to delete a database in MySQL.
A. Combine rows from two or more tables
B. Sort the result set
C. Combine rows into groups
D. Join multiple tables
The UNION operator is used to combine rows from two or more tables.
A. Automatically adds a new row
B. Automatically updates or deletes related rows
C. Allows NULL values
D. Sorts values in ascending order
CASCADE automatically updates or deletes related rows when the referenced row is updated or deleted.
A. VARCHAR
B. TEXT
C. BLOB
D. CHAR
'TEXT' is used to store large text values in MySQL.
A. Find the average value
B. Find the total number of rows
C. Find the highest value
D. Find the lowest value
AVG() is used to find the average value of a numeric column.
A. CREATE TABLE
B. NEW TABLE
C. ADD TABLE
D. INSERT TABLE
'CREATE TABLE' is used to create a new table in a database.
A. Filter rows
B. Rename a column or table
C. Sort the result set
D. Combine rows into groups
The AS keyword is used to rename a column or table in SQL.
A. Automatically increments the value of a column
B. Sets a column to a predefined value
C. Allows NULL values in a column
D. Adds a default value to a column
AUTO_INCREMENT automatically increments the value of a column in MySQL.
A. MIN()
B. LOW()
C. BOTTOM()
D. LEAST()
'MIN()' is used to find the lowest value in a column.
A. Filter rows based on a range
B. Filter rows based on a list of values
C. Sort the result set
D. Join multiple tables
The IN operator is used to filter rows based on a list of values.
A. ADD COLUMN
B. MODIFY COLUMN
C. INSERT COLUMN
D. CHANGE COLUMN
'ADD COLUMN' is used to add a new column to an existing table.
A. Display the structure of a table
B. Show the list of tables in a database
C. Display the content of a table
D. Show the indexes of a table
'SHOW TABLES' is used to display the list of tables in a database.
A. ADD INDEX
B. CREATE INDEX
C. INDEX TABLE
D. ALTER INDEX
'ADD INDEX' is used to add an index to an existing table in MySQL.
A. Sort in descending order
B. Specify a description
C. Sort in ascending order
D. Display columns
'DESC' is used in an ORDER BY clause to sort in descending order.
A. UPDATE VALUES
B. MODIFY VALUES
C. SET VALUES
D. UPDATE SET
'UPDATE SET' is used to update values in a table based on a condition in MySQL.
A. Save changes to the database
B. Undo changes made during the current transaction
C. Commit changes to the database
D. Delete records from the database
ROLLBACK is used to undo changes made during the current transaction.
A. Load data from a file into a table
B. Load data from a table into a file
C. Load data from one database to another
D. Load data from multiple tables
'LOAD DATA INFILE' is used to load data from a file into a table in MySQL.
A. NOW()
B. CURRENT_DATE()
C. GETDATE()
D. SYSDATE()
'NOW()' is used to find the current date and time in MySQL.
A. Count all rows
B. Count only distinct rows
C. Count rows based on a condition
D. Count rows in a specific column
'COUNT(DISTINCT)' is used to count only distinct rows in MySQL.
A. MyISAM
B. InnoDB
C. MEMORY
D. ARCHIVE
The default storage engine in MySQL is MyISAM.
A. DELETE TABLE
B. REMOVE TABLE
C. DROP TABLE
D. DELETE FROM TABLE
'DROP TABLE' is used to remove a table from a database in MySQL.
A. CONCAT()
B. MERGE()
C. COMBINE()
D. STRING()
'CONCAT()' is used to concatenate strings in MySQL.
A. Remove specific records
B. Remove all records and reset auto-increment
C. Remove duplicate records
D. Remove NULL values
'TRUNCATE TABLE' removes all records and resets the auto-increment in MySQL.
A. UNIQUE
B. ADD UNIQUE
C. CONSTRAINT UNIQUE
D. CREATE CONSTRAINT
'ADD UNIQUE' is used to create a unique constraint on a column in MySQL.
A. Atomicity, Consistency, Isolation, Durability
B. Association, Consistency, Isolation, Dependency
C. Atomicity, Consistency, Integration, Durability
D. Association, Commitment, Isolation, Dependency
"ACID" stands for Atomicity, Consistency, Isolation, Durability in transaction management.
A. GRANT ALL PRIVILEGES
B. GRANT FULL ACCESS
C. GRANT SUPERUSER
D. GRANT ALL RIGHTS
'GRANT ALL PRIVILEGES' is used to grant all privileges to a user in MySQL.
A. Retrieve all rows from the left table
B. Retrieve rows that have no matching rows in the right table
C. Combine rows from two or more tables
D. Exclude specified rows
LEFT JOIN retrieves all rows from the left table, and the matched rows from the right table.
A. Ensures unique values in a column
B. Establishes a link between two tables
C. Limits the number of rows returned
D. Sets a default value for a column
FOREIGN KEY establishes a link between two tables based on a column.
A. STRLEN()
B. LEN()
C. LENGTH()
D. STRINGLENGTH()
'LENGTH()' is used to find the length of a string in MySQL.
A. Combine multiple columns
B. Replace NULL values with a specified value
C. Calculate the average value
D. Concatenate multiple rows
'COALESCE()' is used to replace NULL values with a specified value in MySQL.
A. Binary Large Object
B. Basic Long Object
C. Binary Linked Object
D. Basic Linked Object
BLOB stands for Binary Large Object and is used to store binary data.
A. MODIFY TABLE
B. CHANGE TABLE
C. ALTER TABLE
D. UPDATE TABLE
'ALTER TABLE' is used to change the structure of an existing table in MySQL.
A. Filter rows based on a condition
B. Sort the result set
C. Combine rows into groups
D. Search for a specified pattern in a column
The LIKE operator is used to search for a specified pattern in a column in MySQL.
A. GETUSER()
B. CURRENT_USER()
C. USER()
D. GET_CURRENT_USER()
'CURRENT_USER()' is used to find the current user in MySQL.
A. Stores binary data
B. Stores a list of values
C. Stores floating-point numbers
D. Stores integer values
The ENUM data type in MySQL is used to store a list of values.
A. REMOVE PRIVILEGES
B. DELETE PRIVILEGES
C. DROP PRIVILEGES
D. REVOKE
'REVOKE' is used to remove a user's privileges in MySQL.
A. Calculate the average value
B. Replace NULL values with a specified value
C. Concatenate multiple rows
D. Round numeric values
'IFNULL()' is used to replace NULL values with a specified value in MySQL.
A. Table Structured Query Language
B. Transactional SQL
C. Transact-SQL
D. Table SQL
T-SQL stands for Transact-SQL in SQL Server.
A. DATETIME
B. DATE
C. TIMESTAMP
D. TIME
'DATETIME' is used to store a date and time combination in SQL Server.
A. Filter rows
B. Sort the result set
C. Limit the number of rows returned
D. Join multiple tables
The SELECT TOP clause is used to limit the number of rows returned in SQL Server.
A. DELETE FROM table;
B. REMOVE * FROM table;
C. TRUNCATE TABLE table;
D. DROP TABLE table;
'DELETE FROM table;' is used to delete records from a table in SQL Server.
A. Filter rows
B. Sort the result set
C. Combine rows into groups
D. Join multiple tables
The GROUP BY clause is used to combine rows into groups in SQL Server.
A. STRLEN()
B. LEN()
C. LENGTH()
D. STRINGLENGTH()
'LEN()' is used to find the length of a string in SQL Server.
A. Combines rows from two or more tables
B. Retrieves all rows from a table
C. Retrieves rows that have no matching rows in the other table
D. Excludes specified rows
INNER JOIN combines rows from two or more tables based on a related column.
A. ADD COLUMN
B. MODIFY COLUMN
C. INSERT COLUMN
D. CHANGE COLUMN
'ADD COLUMN' is used to add a new column to an existing table in SQL Server.
A. Filter rows based on a condition
B. Sort the result set
C. Combine rows into groups
D. Search for a specified pattern in a column
The LIKE operator is used to search for a specified pattern in a column in SQL Server.
A. CONCAT()
B. MERGE()
C. COMBINE()
D. STRING()
'CONCAT()' is used to concatenate strings in SQL Server.
A. Filter rows
B. Group rows
C. Sort the result set
D. Combine rows into groups
The ORDER BY clause is used to sort the result set in SQL Server.
A. Ensures unique values in a column
B. Limits the number of rows returned
C. Enforces a condition on a column
D. Sets a default value for a column
CHECK constraint enforces a condition on a column in SQL Server.
A. DELETE TABLE
B. REMOVE TABLE
C. DROP TABLE
D. DELETE FROM TABLE
'DROP TABLE' is used to remove a table from a database in SQL Server.
A. Save changes to the database
B. Undo changes made during the current transaction
C. Commit changes to the database
D. Delete records from the database
ROLLBACK is used to undo changes made during the current transaction in SQL Server.
A. UPDATE VALUES
B. MODIFY VALUES
C. SET VALUES
D. UPDATE SET
'UPDATE SET' is used to update values in a table based on a condition in SQL Server.
A. Establish a link between two tables
B. Automatically increments the value of a column
C. Enforce a unique constraint
D. Limit the number of rows returned
IDENTITY automatically increments the value of a column in SQL Server.
A. UNIQUE
B. ADD UNIQUE
C. CONSTRAINT UNIQUE
D. CREATE CONSTRAINT
'UNIQUE' is used to create a unique constraint on a column in SQL Server.
A. Atomicity, Consistency, Isolation, Durability
B. Association, Consistency, Isolation, Dependency
C. Atomicity, Consistency, Integration, Durability
D. Association, Commitment, Isolation, Dependency
"ACID" stands for Atomicity, Consistency, Isolation, Durability in transaction management in SQL Server.
A. Sort the result set
B. Filter rows
C. Eliminate duplicate values
D. Combine rows into groups
'DISTINCT' is used to eliminate duplicate values in the result set in SQL Server.
A. GRANT ALL PRIVILEGES
B. GRANT FULL ACCESS
C. GRANT SUPERUSER
D. GRANT ALL RIGHTS
'GRANT ALL PRIVILEGES' is used to grant all privileges to a user in SQL Server.
A. Filter rows
B. Sort the result set
C. Filter groups
D. Combine rows into groups
The HAVING clause is used to filter groups based on a condition in SQL Server.
A. CREATE TABLE
B. NEW TABLE
C. ADD TABLE
D. INSERT TABLE
'CREATE TABLE' is used to create a new table in a database in SQL Server.
A. Combines rows from two or more tables
B. Retrieves all rows from a table
C. Retrieves rows that have no matching rows in the other table
D. Generates the Cartesian product of two tables
CROSS JOIN generates the Cartesian product of two tables in SQL Server.
A. Find the average value
B. Find the total number of rows
C. Find the highest value
D. Find the lowest value
AVG() is used to find the average value of a numeric column in SQL Server.
A. MODIFY
B. CHANGE
C. UPDATE
D. SET
'UPDATE' is used to change the value of an existing record in a table in SQL Server.
A. Stores binary data
B. Stores integer values
C. Stores floating-point numbers
D. Stores a list of values
FLOAT is used to store floating-point numbers in SQL Server.
A. ALLOW PRIVILEGES
B. GRANT PRIVILEGES
C. GRANT
D. ALLOW ACCESS
'GRANT' is used to grant specific privileges to a user in SQL Server.
A. Filter rows
B. Sort the result set
C. Limit the number of rows returned
D. Join multiple tables
The LIMIT clause is used to limit the number of rows returned in SQL Server.
A. Stores XML data
B. Stores binary data
C. Stores integer values
D. Stores a list of values
The XML data type in SQL Server is used to store XML data.
A. INSERT INTO
B. ADD ROW
C. NEW ROW
D. CREATE ROW
'INSERT INTO' is used to add a new row to a table in SQL Server.
A. Combine multiple columns
B. Replace NULL values with a specified value
C. Calculate the average value
D. Concatenate multiple rows
'ISNULL()' is used to replace NULL values with a specified value in SQL Server.
A. Stores binary data
B. Stores integer values
C. Stores floating-point numbers
D. Stores a list of values
VARBINARY is used to store binary data in SQL Server.
A. REMOVE PRIVILEGES
B. DELETE PRIVILEGES
C. DROP PRIVILEGES
D. REVOKE
'REVOKE' is used to remove a user's privileges in SQL Server.
A. Find the average value
B. Find the length of a string
C. Find the position of a substring in a string
D. Concatenate multiple strings
'CHARINDEX()' is used to find the position of a substring in a string in SQL Server.
A. Generate a sequence of numbers
B. Execute a set of statements in response to an event
C. Establish a link between two tables
D. Enforce a unique constraint
A TRIGGER in SQL Server is used to execute a set of statements in response to an event.
A. Count the number of rows affected by a query
B. Suppress the count of the number of rows affected by a query
C. Count the total number of rows in a table
D. Disable the use of COUNT function
'SET NOCOUNT ON' is used to suppress the count of the number of rows affected by a query in SQL Server.
A. DIFFDATEDAYS()
B. DATEDIFF()
C. DIFFDATE()
D. DATE_DIFF()
'DATEDIFF()' is used to find the difference between two dates in SQL Server.
A. Extract a single value from an XML string
B. Combine multiple XML values
C. Concatenate XML strings
D. Validate XML structure
The value() method is used to extract a single value from an XML string in SQL Server.
A. MODIFY TABLE
B. CHANGE TABLE
C. ALTER TABLE
D. UPDATE TABLE
'ALTER TABLE' is used to change the structure of an existing table in SQL Server.
A. Execute a set of statements in a loop
B. Handle exceptions and errors in a controlled manner
C. Define a cursor for record processing
D. Create a temporary table
The TRY...CATCH block is used to handle exceptions and errors in a controlled manner in SQL Server.
A. Filter rows based on a condition
B. Sort the result set
C. Combine rows into groups
D. Perform conditional logic in a query
The CASE statement is used to perform conditional logic in a query in SQL Server.
A. ADD INDEX
B. CREATE INDEX
C. INDEX TABLE
D. ALTER INDEX
'CREATE INDEX' is used to create an index on a table in SQL Server.
A. Combine rows from two or more tables
B. Rotate rows into columns based on values in a specified column
C. Sort the result set
D. Join multiple tables
The PIVOT operator is used to rotate rows into columns based on values in a specified column in SQL Server.
A. DELETE INDEX
B. REMOVE INDEX
C. DROP INDEX
D. ERASE INDEX
'DROP INDEX' is used to remove an index from a table in SQL Server.
A. Combine rows from two or more tables
B. Rotate columns into rows based on values in a specified column
C. Sort the result set
D. Join multiple tables
The UNPIVOT operator is used to rotate columns into rows based on values in a specified column in SQL Server.
A. Suppress errors in a query
B. Display a custom error message
C. Count the number of errors in a query
D. Create a temporary error table
The RAISEERROR statement is used to display a custom error message in SQL Server.
A. Combine rows from two or more tables
B. Update, insert, or delete data based on a condition
C. Sort the result set
D. Join multiple tables
The MERGE statement is used to update, insert, or delete data based on a condition in SQL Server.
A. GRANT EXECUTE
B. GRANT EXECUTION
C. ALLOW EXECUTE
D. ALLOW EXECUTION
'GRANT EXECUTE' is used to grant execute permissions on a stored procedure in SQL Server.
A. Index an entire XML column
B. Index specific elements or attributes in an XML column
C. Exclude XML columns from indexing
D. Disable indexing for XML columns
The XML INDEX option is used to index specific elements or attributes in an XML column in SQL Server.
A. Concatenate multiple values
B. Convert a value to a different data type and handle errors gracefully
C. Find the average value
D. Validate XML structure
'TRY_CONVERT()' is used to convert a value to a different data type and handle errors gracefully in SQL Server.
A. DELETE TABLE
B. REMOVE TABLE
C. TRUNCATE TABLE
D. DROP TABLE
'TRUNCATE TABLE' is used to remove all records from a table and reset identity seed in SQL Server.
A. Generate a sequence of numbers
B. Execute a set of statements in a loop
C. Define a cursor for record processing
D. Create a temporary table
The SEQUENCE object is used to generate a sequence of numbers in SQL Server.
A. Combine rows from two or more tables
B. Rotate rows into columns based on values in a specified column
C. Execute a table-valued function for each row
D. Sort the result set
The CROSS APPLY operator is used to execute a table-valued function for each row in SQL Server.
A. RENAME TABLE
B. ALTER TABLE RENAME
C. ALTER TABLE RENAME TO
D. ALTER TABLE RENAME AS
'ALTER TABLE RENAME TO' is used to rename a table in SQL Server.
A. Perform full-text search
B. Concatenate multiple columns
C. Validate XML structure
D. Generate a sequence of numbers
'CONTAINSTABLE' is used to perform a full-text search in SQL Server.
A. Find the length of a string
B. Find the current user
C. Calculate the average value
D. Concatenate multiple rows
'SYSTEM_USER' is used to find the current user in SQL Server.
A. Concatenate multiple columns
B. Parse a string into a specified data type
C. Calculate the average value
D. Generate a sequence of numbers
The PARSE() function is used to parse a string into a specified data type in SQL Server.
A. CREATE PROCEDURE
B. NEW PROCEDURE
C. ADD PROCEDURE
D. INSERT PROCEDURE
'CREATE PROCEDURE' is used to create a stored procedure in SQL Server.
A. Mathematical constant representing the ratio of a circle's circumference to its diameter
B. Numeric constant representing the speed of light
C. Constant representing the number of days in a year
D. Constant representing the number of seconds in a minute
The PI constant represents the mathematical constant π in SQL Server.
A. Concatenate multiple strings
B. Quote an identifier to make it a valid SQL Server delimited identifier
C. Calculate the average value
D. Round numeric values
'QUOTENAME()' is used to quote an identifier to make it a valid SQL Server delimited identifier.
A. Structured Question Language
B. Standard Query Language
C. Sequential Query Language
D. Structured Query Language
SQL stands for Structured Query Language in the context of Oracle Database.
A. VARCHAR2
B. CHAR
C. CLOB
D. VARCHAR
'CHAR' is used to store fixed-length character strings in Oracle.
A. Concatenate multiple columns
B. Replace NULL values with a specified value
C. Calculate the average value
D. Concatenate multiple rows
'NVL()' is used to replace NULL values with a specified value in Oracle.
A. ADD INDEX
B. CREATE INDEX
C. INDEX TABLE
D. ALTER INDEX
'CREATE INDEX' is used to add an index to an existing table in Oracle.
A. Convert a date to a string
B. Convert a string to a date
C. Concatenate multiple dates
D. Round a date value
'TO_DATE()' is used to convert a string to a date in Oracle.
A. Store binary data
B. Store XML data
C. Provide a one-row, one-column table for selecting expressions
D. Store numeric values
The 'DUAL' table is a one-row, one-column table in Oracle used for selecting expressions.
A. STRLEN()
B. LEN()
C. LENGTH()
D. STRINGLENGTH()
'LENGTH()' is used to find the length of a string in Oracle.
A. Save changes to the database
B. Undo changes made during the current transaction
C. Commit changes to the database
D. Delete records from the database
'ROLLBACK' is used to undo changes made during the current transaction in Oracle.
A. CREATE TABLE
B. NEW TABLE
C. ADD TABLE
D. INSERT TABLE
'CREATE TABLE' is used to create a new table in a database in Oracle.
A. Combine rows from two or more tables
B. Retrieve all rows from the left table
C. Retrieve rows that have no matching rows in the right table
D. Exclude specified rows
'JOIN' is used to combine rows from two or more tables based on a related column in Oracle.
A. GRANT ALL PRIVILEGES
B. GRANT FULL ACCESS
C. GRANT SUPERUSER
D. GRANT ALL RIGHTS
'GRANT ALL PRIVILEGES' is used to grant all privileges to a user in Oracle.
A. Combine rows from two or more tables
B. Rotate rows into columns based on values in a specified column
C. Sort the result set
D. Join multiple tables
'UNION' is used to combine the results of two or more SELECT statements in Oracle.
A. Filter rows
B. Sort the result set
C. Filter groups
D. Combine rows into groups
The 'HAVING' clause is used to filter groups based on a condition in Oracle.
A. DELETE TABLE
B. REMOVE TABLE
C. DROP TABLE
D. DELETE FROM TABLE
'DROP TABLE' is used to remove a table from a database in Oracle.
A. Filter rows
B. Sort the result set
C. Combine rows into groups
D. Join multiple tables
The 'GROUP BY' clause is used to combine rows into groups in Oracle.
A. Remove specific records
B. Remove all records and reset auto-increment
C. Remove duplicate records
D. Remove NULL values
'TRUNCATE TABLE' removes all records and resets the auto-increment in Oracle.
A. VARCHAR
B. TEXT
C. CLOB
D. CHAR
'CLOB' is used to store large text values in Oracle.
A. Combine rows from two or more tables
B. Update, insert, or delete data based on a condition
C. Sort the result set
D. Join multiple tables
The 'MERGE' statement is used to update, insert, or delete data based on a condition in Oracle.
A. CREATE SEQUENCE
B. NEW SEQUENCE
C. ADD SEQUENCE
D. INSERT SEQUENCE
'CREATE SEQUENCE' is used to create a sequence in Oracle.
A. Stores XML data
B. Stores binary data
C. Stores integer values
D. Stores a list of values
The 'XMLType' data type in Oracle is used to store XML data.
A. Concatenate multiple values
B. Find the length of a string
C. Retrieve the value of a parameter in the database context
D. Validate XML structure
'SYS_CONTEXT' is used to retrieve the value of a parameter in the database context in Oracle.
A. ALLOW PRIVILEGES
B. GRANT PRIVILEGES
C. GRANT
D. ALLOW ACCESS
'GRANT' is used to grant specific privileges to a user in Oracle.
A. Filter rows based on a range of values
B. Sort the result set
C. Combine rows into groups
D. Search for a specified pattern in a column
'BETWEEN' is used to filter rows based on a range of values in Oracle.
A. Calculate the average value
B. Assign a rank to each row within a result set
C. Concatenate multiple rows
D. Find the length of a string
'RANK()' is used to assign a rank to each row within a result set in Oracle.
A. Combine rows from two or more tables
B. Rotate rows into columns based on values in a specified column
C. Find the common rows between two SELECT statements
D. Join multiple tables
The 'INTERSECT' operator is used to find the common rows between two SELECT statements in Oracle.
A. REMOVE PRIVILEGES
B. DELETE PRIVILEGES
C. DROP PRIVILEGES
D. REVOKE
'REVOKE' is used to remove a user's privileges in Oracle.
A. Generate a random globally unique identifier
B. Concatenate multiple columns
C. Calculate the average value
D. Round numeric values
'SYS_GUID()' is used to generate a random globally unique identifier in Oracle.
A. Concatenate multiple strings
B. Output a line of text to the console
C. Calculate the average value
D. Round numeric values
'DBMS_OUTPUT.PUT_LINE()' is used to output a line of text to the console in Oracle.
A. GETUSER()
B. CURRENT_USER()
C. USER()
D. SESSION_USER()
'USER()' is used to find the current user in Oracle.
A. Perform data manipulation tasks
B. Schedule and manage jobs, including PL/SQL blocks and stored procedures
C. Calculate the average value
D. Create database links
The 'DBMS_SCHEDULER' package is used to schedule and manage jobs in Oracle.
A. Concatenate multiple columns
B. Find the length of a string
C. Find the position of a substring in a string
D. Concatenate multiple rows
'INSTR()' is used to find the position of a substring in a string in Oracle.
A. GRANT EXECUTE
B. GRANT EXECUTION
C. ALLOW EXECUTE
D. ALLOW EXECUTION
'GRANT EXECUTE' is used to grant execute permissions on a stored procedure in Oracle.
A. Combine rows from two or more tables
B. Create a temporary result set for use in a SELECT statement
C. Sort the result set
D. Join multiple tables
The 'WITH' clause is used to create a temporary result set for use in a SELECT statement in Oracle.
A. Perform data manipulation tasks
B. Read and write files on the server's file system
C. Calculate the average value
D. Create triggers
The 'UTL_FILE' package is used to read and write files on the server's file system in Oracle.
A. Concatenate multiple values
B. Perform bitwise AND operation on two numbers
C. Calculate the average value
D. Round numeric values
'BITAND()' is used to perform a bitwise AND operation on two numbers in Oracle.