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Introduction to SQL

Introduction to SQL
The SQL keyword GROUP BY instructs the DBMS to group together those rows that have the same value in a column.

False
True

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Introduction to SQL
Which of the following is the original purpose of SQL?

To specify the syntax and semantics of SQL data definition language
All of these
To specify the syntax and semantics of SQL manipulation language
To define the data structures

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Introduction to SQL
Which of the following do you need to consider when you make a table in SQL?

Primary keys
Data types
All of these
Default values

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Introduction to SQL
The SQL statementSELECT SUBSTR('123456789', INSTR('abcabcabc', 'b'), 4) FROM DUAL;

456789
6789
2345
1234

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Introduction to SQL
The wildcard asterisk (*) is the SQL-92 standard for indicating "any sequence of characters."

False
True

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Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

prints 045.926
prints garbage
prints 50
is illegal

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