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Introduction to SQL

Introduction to SQL
Which of the following is a valid SQL type?

CHARACTER
NUMERIC
All of these
FLOAT

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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 > ANY (SELECT SALARY FROM EMPLOYEE);prints

9
5
10
0

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Introduction to SQL
A subquery in an SQL SELECT statement:

has a distinct form that cannot be duplicated by a join.
cannot have its results sorted using ORDER BY.
can only be used with two tables.
can always be duplicated by a join.

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Introduction to SQL
In SQL, which of the following is not a data definition language commands?

UPDATE
REVOKE
RENAME
GRANT

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

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

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Introduction to SQL
The command to eliminate a table from a database is:

UPDATE TABLE CUSTOMER;
DROP TABLE CUSTOMER;
REMOVE TABLE CUSTOMER;
DELETE TABLE CUSTOMER;

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