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Introduction to SQL

Introduction to SQL
Which command undo all the updates performed by the SQL in the transaction?

ROLLBACK
DELETE
COMMIT
TRUNCATE

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Introduction to SQL
Which of the following must be enclosed in double quotes?

Column Alias
Dates
Strings
All of these

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Introduction to SQL
Table Employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.The SQL statementSELECT COUNT(*) FROM Employee WHERE SALARY > ANY (SELECT SALARY FROM EMPLOYEE);prints

10
0
5
9

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Introduction to SQL
The FROM SQL clause is used to...

specify search condition
None of these
specify range for search condition
specify what table we are selecting or deleting data FROM

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Introduction to SQL
............. joins two or more tables based on a specified column value not equaling a specified column value in another table.

NATURAL JOIN
OUTER JOIN
NON-EQUIJOIN
EQUIJOIN

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Introduction to SQL
To establish a range of values, < and > can be used.

False
True

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