sql allows the use of logical restrictions on its inquiries such as or, and, and not.

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20-12-2022
Computers and Technology

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sql allows the use of logical restrictions on its inquiries such as or, and, and not.

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rekharaypriti8910 rekharaypriti8910 · Answer 1 · 2022-12-24T02:55:21-05:00

On its queries, SQL supports the use of logical constraints like OR, AND, and NOT. When combined with the WHERE clause, special operators like LIKE, IN, and Is NULL are permissible in ANSI-standard SQL.

To identify patterns inside string properties, the conditional LIKE is combined with wildcard characters. When all the results' columns are identical, UNION eliminates duplicate records; UNION ALL does not. The number of rows to return is specified using the SELECT TOP clause. On huge tables with tens of thousands of records, the SELECT TOP clause is helpful. Any record in a subquery can be checked for existence using the EXISTS operator. If the subquery produces one or more records, the EXISTS operator returns TRUE.

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