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Introduction to SQL

Introduction to SQL
Which SQL statement is used to delete data FROM a database?

DELETE
ALTER
REMOVE
COLLAPSE

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Introduction to SQL
Which of the following is illegal?

SELECT SYSDATE - SYSDATE FROM DUAL;
SELECT SYSDATE - (SYSDATE + 2) FROM DUAL;
SELECT SYSDATE - (SYSDATE - 2) FROM DUAL;
None of these

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Introduction to SQL
The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.

True
False

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Introduction to SQL
What is the full form of SQL?

Structured Query Language
None of these
Simple Query Language
Structured Query List

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Introduction to SQL
The SQL statement: SELECT Name, COUNT(*) FROM NAME_TABLE; counts the number of name rows and displays this total in a table with a single row and a single column.

True
False

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Introduction to SQL
Which of the following is a SQL aggregate function?

LEN
AVG
JOIN
LEFT

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