避免在同一张桌子上重复选择的有效方法 [英] Efficient method to avoid repeated select on same table

问题描述

我需要在表dbo.test上执行select语句，该表具有约4000条记录的数据.我需要在SP中以不同的条件执行8次select statemnt，并且需要将8个不同的记录集插入到8个不同的故事中.能否为我的疑问提供解决方案

我可能需要在SP中临时存储数据，或者更好地在表(dbo.test)本身上执行select statemnt 8次.
如果最好将临时存储在我的SP中，哪种方法会比较有效(使用临时表或表变量或任何其他方法)，我需要创建一个SP来执行上述操作.

预先感谢

Hi,
I need to perform select statement on table dbo.test,which is having data aroung 4000 records.And i need to perform the select statemnt around 8 times in my SP with differenct conditions and need to insert the 8 differenct record set to 8 different tales.Can you please provide solutions to my doubt

May i need to temporary store data in SP,or its better to perform the select statemnt 8 times on the table (dbo.test) itself.
If its better to store temporary in my SP, Which method will be efficient (using temp table or table variable or any other method) I need to create a SP to perform the above action.

Thanks in advance

推荐答案

如果您要从选择中返回一组记录以供以后在同一SP中重新使用，则应使用临时表.出于性能和多用户的原因，表变量(可能是原始表中指示已选择"的字段)不是一个好主意:为了以防万一，您必须一开始就清除所有变量，然后设置它们需要，然后在SP的末尾将其全部清除.

If your are returning a set of records from your select to re-use later within the same SP, then you should use a temporary table. A table variable (presumably a field in the original table which indicates "selected") would not be a good idea, for performance and multi-user reasons: You would have to clear them all at the start just in case, set the ones you want, then clear them all at the end of the SP.

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