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Introduction to SQL

Introduction to SQL
COUNT(field_name) tallies only those rows that contain a value; it ignores all null values.

False
True

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

6789
456789
1234
2345

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Introduction to SQL
The format SELECT-FROM-WHERE is the fundamental framework of SQL SELECT statements.

False
True

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Introduction to SQL
Which SQL keyword is used to retrieve a maximum value?

UPPER
MOST
TOP
MAX

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Introduction to SQL
SQL is a programming language.

True
False

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Introduction to SQL
The SQL WHERE clause:

limits the row data are returned.
limits the column data that are returned.
Both A and B are correct.
Neither A nor B are correct.

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