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SQL Interview Questions & Answers

Below we have listed all the SQL Interview Questions and answers. Feel free to comment on any SQL Interview Questions or answer by the comment feature available on the page.

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What is the use of CASCADE CONSTRAINTS? View Answer

Why does the following command give a compilation error? DROP TABLE &TABLE_NAME; View Answer

What is the difference between TRUNCATE and DELETE commands? View Answer

What is the output of the following query SELECT TRUNC(1234.5678,-2) FROM DUAL; View Answer

what is the difference between replace and translate functions? View Answer

What will be the output of the following query? SELECT DECODE(TRANSLATE('A','1234567890','1111111111'), '1','YES', 'NO' ); View Answer

How we get second highest salary in database. Please show me this coding. View Answer

What are the advantages and disadvantages of primary key and foreign key in SQL? View Answer

Which date function is used to find the difference between two dates? View Answer

Difference between decode and case. in which case we are using case and in which case we are using decode? with an example. View Answer

What is the difference between cross product & Cartesian product? View Answer

Difference between Store Procedure and Trigger View Answer

How to programmatically find out when the SQL Server service started? View Answer

What is a default TCP/IP socket assigned for SQL Server? View Answer

What will be the output of the following query? SELECT REPLACE(TRANSLATE(LTRIM(RTRIM('!! ATHEN !!','!'), '!'), 'AN', '**'),'*','TROUBLE') FROM DUAL; View Answer

What command is used to create a table by copying the structure of another table? View Answer

What does the following query do? SELECT SAL + NVL(COMM,0) FROM EMP; View Answer

How can i hide a particular table name of our schema. View Answer

How to delete same id in rows? For example empid=5 repeated for times in rows. How to delete which sql query is used? View Answer

Which system tables contain information on privileges granted and privileges obtained? View Answer

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