sql - 使用 t-SQL 选择已删除记录的数量

Question

我似乎不知道如何使用 SQL Server 2008 选择以前删除的记录数。是这样的吗？

DELETE FROM [table] WHERE [id]=10
SELECT SCOPE_IDENTITY()

Answer 1

使用SELECT @@ROWCOUNT紧接着 DELETE陈述。您可以read more about @@ROWCOUNT on MSDN :

@@ROWCOUNT

Returns the number of rows affected by the last statement.

Remarks

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Data manipulation language (DML) statements set the @@ROWCOUNT value to the number of rows affected by the query and return that value to the client. The DML statements may not send any rows to the client.

请注意，我说“立即之后”，因为其他语句可以更改 @@ROWCOUNT 的值，即使它们本身不影响行:

DECLARE CURSOR and FETCH set the @@ROWCOUNT value to 1.

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Statements such as USE, SET <option>, DEALLOCATE CURSOR, CLOSE CURSOR, BEGIN TRANSACTION or COMMIT TRANSACTION reset the ROWCOUNT value to 0.