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p.belezov 2025-01-16 12:35:38 +08:00
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27
MySQL/all_foreign_keys_to_table_or_column.md Normal file
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# Find all tables whose foreign key refers to the table/column
[SQL File](/sql/all_foreign_keys_to_table_or_column.sql)
## By table
```
SELECT
TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME
FROM
INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE
REFERENCED_TABLE_SCHEMA = (SELECT DATABASE()) AND
REFERENCED_TABLE_NAME = '<insert_table_name>';
```
## By table column
```
SELECT
TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME
FROM
INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE
REFERENCED_TABLE_SCHEMA = (SELECT DATABASE()) AND
REFERENCED_TABLE_NAME = '<insert_table_name>' AND
REFERENCED_COLUMN_NAME = '<insert_column_name>';
```

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MySQL/sql/all_foreign_keys_to_table_or_column.sql Normal file
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# Find all tables whose foreign key refers to the table/column
# BY TABLE
SELECT
TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME
FROM
INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE
REFERENCED_TABLE_SCHEMA = (SELECT DATABASE()) AND
REFERENCED_TABLE_NAME = '<insert_table_name>';
# BY TABLE COLUMN
SELECT
TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME
FROM
INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE
REFERENCED_TABLE_SCHEMA = (SELECT DATABASE()) AND
REFERENCED_TABLE_NAME = '<insert_table_name>' AND
REFERENCED_COLUMN_NAME = '<insert_column_name>';