在MySQL中联接同一表的临时表 [英] Join the same table temporary table in MySQL

问题描述

我喜欢在MySQL中加入一个失败的临时表，这个想法很简单:

I like to join a temporary table in MySQL which fails, the idea quite simple:

CREATE TEMPORARY TABLE temp_table LIKE any_other_table; -- srsly it does not matter which table

(
  SELECT p1,p2,p3 FROM temp_table WHERE p4 = 1
) UNION (
  SELECT p1,p2,p3 FROM temp_table WHERE p4 = 2
)

非常感谢您的帮助.

mysql抛出的错误是ERROR 1137 (HY000): Can't reopen table: 'temp_table'

The error thrown by mysql is ERROR 1137 (HY000): Can't reopen table: 'temp_table'

推荐答案

在同一查询中，您不能多次引用TEMPORARY表.

You cannot refer to a TEMPORARY table more than once in the same query.

请阅读以下链接 http://dev.mysql.com/doc/refman /5.5/en/temporary-table-problems.html

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