本文介绍了SQL查询找到表的主键?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如何通过使用查询查找表的主键的哪一列?

How can I find which column is the primary key of a table by using a query?

推荐答案

对于Oracle,您可以在 ALL_CONSTRAINTS 表:

For Oracle, you can look it up in the ALL_CONSTRAINTS table:

SELECT a.COLUMN_NAME
FROM all_cons_columns a INNER JOIN all_constraints c
     ON a.constraint_name = c.constraint_name
WHERE c.table_name = 'TBL'
  AND c.constraint_type = 'P';

演示 .

DEMO.

对于SQL Server,已经在此处进行了回答,对于MySQL,请检查@ajon的答案.

For SQL Server, it was already answered here, and for MySQL check @ajon's answer.

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09-11 17:53