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Introduction to SQL

Introduction to SQL
Which of the following SQL commands can be used to add data to a database table?

APPEND
ADD
INSERT
UPDATE

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

456789
1234
6789
2345

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Introduction to SQL
The SQL -92 wildcards are ____ and ____ .

underscore(_); question mark (?)
asterisk (*); percent sign (%)
question mark (?); asterisk (*)
percent sign (%); underscore (_)

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Introduction to SQL
The keyword LIKE can be used in a WHERE clause to refer to a range of values.

True
False

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Introduction to SQL
Which SQL keyword is used to retrieve only unique values?

DIFFERENT
UNIQUE
DISTINCTIVE
DISTINCT

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Introduction to SQL
Table employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.The SQL statementSELECT COUNT(*) FROM employee WHERE SALARY > ALL (SELECT SALARY FROM EMPLOYEE);prints

0
9
5
10

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