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Introduction to SQL

Introduction to SQL
SQL query and modification commands make up a(n) ________ .

XML
DDL
DML
HTML

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Introduction to SQL
When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):

Both IN and NOT IN.
NOT IN only.
LIKE only.
IN only.

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Introduction to SQL
Data manipulation language (DML) commands are used to define a database, including creating, altering, and dropping tables and establishing constraints.

True
False

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Introduction to SQL
The SQL statementSELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL;prints

23
bc
ab
gh

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Introduction to SQL
DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement.

True
False

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Introduction to SQL
The command to remove rows from a table 'CUSTOMER' is:

UPDATE FROM CUSTOMER ...
DROP FROM CUSTOMER ...
DELETE FROM CUSTOMER WHERE ...
REMOVE FROM CUSTOMER ...

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