What is top command in SQL?

Question

The SQL SELECT TOP Clause The SELECT TOP clause is used to specify the number of records to return. The SELECT TOP clause is useful on large tables with thousands of records. Returning a large number of records can impact performance. Note: Not all database systems support the SELECT TOP clause.

Is top a keyword in SQL?

TOP is a keyword used to retrieve rows from top of the table. n is the number of rows to be retrieved.

What is top and offset in SQL?

Or, use TOP to specify the rows affected by an INSERT, UPDATE, MERGE, or DELETE statement. Applies to: All SQL Server and Azure SQL Databases. OFFSET: Specifies the number of rows to skip before it starts to return rows from the query expression.

What is top in Oracle SQL?

The SQL TOP clause is used to fetch a TOP N number or X percent records from a table. Note − All the databases do not support the TOP clause. For example MySQL supports the LIMIT clause to fetch limited number of records while Oracle uses the ROWNUM command to fetch a limited number of records.

What does top 1 do in SQL Server?

The TOP 1 means to only return one record as the result set. which record is returned, depends on the column that is specified in the order by clause. If you want to find the record with the minimum value for a particular column, you would query the record with the ORDER BY being ascending (ASC).

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