获取MySQL中的外键约束列表-mysql教程-PHP中文网

获取MySQL中的外键约束列表

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发布： 2023-08-31 11:53:10

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获取mysql中的外键约束列表

假设我们有一个包含多个表的数据库“business”。如果您只想显示外键约束，请使用以下查询 -

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mysql> select *
   &minus;> from information_schema.referential_constraints
   &minus;> where constraint_schema = 'business';

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以下是仅显示外键约束的输出 -

+--------------------+-------------------+--------------------------+---------------------------+--------------------------+------------------------+--------------+-------------+-------------+-------------------+-----------------------+
| CONSTRAINT_CATALOG | CONSTRAINT_SCHEMA | CONSTRAINT_NAME          | UNIQUE_CONSTRAINT_CATALOG | UNIQUE_CONSTRAINT_SCHEMA | UNIQUE_CONSTRAINT_NAME | MATCH_OPTION | UPDATE_RULE | DELETE_RULE | TABLE_NAME       | REFERENCED_TABLE_NAME |
+--------------------+-------------------+--------------------------+---------------------------+--------------------------+------------------------+--------------+-------------+-------------+-------------------+-----------------------+
| def                | business          | ConstChild               | def                       | business                 | PRIMARY                | NONE         | NO ACTION   | NO ACTION | childdemo         | parentdemo |
| def                | business          | ConstFK                  | def                       | business                 | PRIMARY                | NONE         | NO ACTION   | NO ACTION | tblf | tblp |
| def                | business          | constFKPK                | def                       | business                 | PRIMARY                | NONE         | NO ACTION   | NO ACTION | foreigntable      | primarytable1 |
| def                | business          | FKConst                  | def                       | business                 | PRIMARY                | NONE         | NO ACTION   | NO ACTION | foreigntabledemo | primarytabledemo |
| def                | business          | primarytable1demo_ibfk_1 | def                       | business                 | PRIMARY                | NONE         | NO ACTION   | NO ACTION | primarytable1demo| foreigntable1 |
| def                | business          | StudCollegeConst         | def                       | business                 | PRIMARY                | NONE         | NO ACTION   | NO ACTION   | studentenrollment| college |
+--------------------+-------------------+--------------------------+---------------------------+--------------------------+------------------------+--------------+-------------+-------------+-------------------+-----------------------+
6 rows in set (0.07 sec)

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