sql - 如何获取 SQL Server 2008 查询中的行数

Question

如何使用 SQL 查询获取行数？

我试过这个：

SET @Records = count(*) SELECT * FROM  [INVENTORY].[TBL_RECEIPTS] 
                WHERE Field_Tag = '1234'

但它给出了 1. 上面的代码有什么问题？

实际上没有行，它应该给输出 0

当我执行这个

SELECT * FROM  [INVENTORY].[TBL_RECEIPTS] 
WHERE Field_Tag = '1234'

它给出了结果 0

score 1 · Accepted Answer

采用

SET @Records = (SELECT count(*)
                  FROM [INVENTORY].[TBL_RECEIPTS]
                 WHERE Field_Tag = '1234')

score 1 · Accepted Answer

1

SELECT @Records = COUNT(*) FROM INVENTORY.TBL_RECEIPTS
   WHERE Field_Tag = '1234';

于 2013-04-04T23:15:14.260 回答

score 1 · Accepted Answer

做这些 - 任何一个都应该工作，但我更喜欢第二个代码

SET @Records = (SELECT Count(*) FROM  [INVENTORY].[TBL_RECEIPTS] 
                WHERE Field_Tag = '1234')

或者

SELECT @Records = Count(*) FROM  [INVENTORY].[TBL_RECEIPTS] 
                WHERE Field_Tag = '1234'

3 回答 3