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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. To buy an eBook containing 30,000 Interview Questions, with Answers, Click Here. View All SQL Interview Questions & Answers - Exam Mode / Learning Mode
SQL Interview Questions & Answers
SQL (pronounced "ess-que-el") stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. SQL consists of a data definition language, data manipulation language, and Data Control Language. The scope of SQL includes data insert, query, update and delete, schema creation and modification, and data access control. Although SQL is often described as, and to a great extent is, a declarative language (4GL), it also includes procedural elements.

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Question	Rating	View Answer
What is the output of the following query SELECT TRUNC(1234.5678,-2) FROM DUAL;		View Answer
Which function is used to find the largest integer less than or equal to a specific value?		View Answer
What is the use of CASCADE CONSTRAINTS?		View Answer
What is the use of DESC in SQL?		View Answer
What is the value of comm and sal after executing the following query if the initial value of ‘sal’ is 10000 UPDATE EMP SET SAL = SAL + 1000, COMM = SAL*0.1;		View Answer
What is the use of the DROP option in the ALTER TABLE command?		View Answer
What is the advantage of specifying WITH GRANT OPTION in the GRANT command?		View Answer
Why does the following command give a compilation error? DROP TABLE &TABLE_NAME;		View Answer
Which date function is used to find the difference between two dates?		View Answer
What does the following query do? SELECT SAL + NVL(COMM,0) FROM EMP;		View Answer
What will be the output of the following query? SELECT DECODE(TRANSLATE('A','1234567890','1111111111'), '1','YES', 'NO' );		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 is the difference between TRUNCATE and DELETE commands?		View Answer
TRUNCATE TABLE EMP; DELETE FROM EMP; Will the outputs of the above two commands differ?		View Answer
Which system table contains information on constraints on all the tables created?		View Answer
Which system tables contain information on privileges granted and privileges obtained?		View Answer
What command is used to get back the privileges offered by the GRANT command?		View Answer
What are the privileges that can be granted on a table by a user to others?		View Answer
State true or false. !=, <>, ^= all denote the same operation.		View Answer