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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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What is the use of CASCADE CONSTRAINTS?		View Answer
How can i hide a particular table name of our schema.		View Answer
TRUNCATE TABLE EMP; DELETE FROM EMP; Will the outputs of the above two commands differ?		View Answer
What does the following query do? SELECT SAL + NVL(COMM,0) FROM EMP;		View Answer
What is the output of the following query SELECT TRUNC(1234.5678,-2) FROM DUAL;		View Answer
What is the difference between TRUNCATE and DELETE commands?		View Answer
Which command executes the contents of a specified file?		View Answer
What will be the output of the following query? SELECT DECODE(TRANSLATE('A','1234567890','1111111111'), '1','YES', 'NO' );		View Answer
What are the wildcards used for pattern matching.		View Answer
Which is the subset of SQL commands used to manipulate Oracle Database structures, including tables?		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
Why does the following command give a compilation error? DROP TABLE &TABLE_NAME;		View Answer
How we get second highest salary in database. Please show me this coding.		View Answer
What is the use of the DROP option in the ALTER TABLE command?		View Answer
what is the difference between replace and translate functions?		View Answer
What operator tests column for the absence of data?		View Answer
How to find out the 10th highest salary in SQL query?		View Answer
What is the difference between cross product & Cartesian product?		View Answer
What are the advantages and disadvantages of primary key and foreign key in SQL?		View Answer
What are the privileges that can be granted on a table by a user to others?		View Answer