MySQL 怎么样能够找出MySQL数据库中包含某列的表
使用 COLUMN_NAME 可以找出数据库中包含特定列的表。我们首先创建一张表 –
mysql> create table DemoTable
-> (
-> CustomerId int,
-> CustomerName varchar(20),
-> CustomerCountryName varchar(100)
-> );
Query OK, 0 rows affected (1.05 sec)
下面是查找哪些表中包含特定列 “CustomerCountryName” 的查询 –
mysql> select *from information_schema.columns WHERE COLUMN_NAME =
'CustomerCountryName';
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输出
将会产生以下输出 –
+---------------+--------------+--------------+---------------------+------------------+----------------+-------------+-----------+--------------------------+------------------------+-------------------+---------------+--------------------+--------------------+-----------------+--------------+------------+-------+---------------------------------+----------------+-----------------------+-------+
| TABLE_CATALOG | TABLE_SCHEMA | TABLE_NAME | COLUMN_NAME |ORDINAL_POSITION | COLUMN_DEFAULT | IS_NULLABLE | DATA_TYPE |CHARACTER_MAXIMUM_LENGTH | CHARACTER_OCTET_LENGTH |NUMERIC_PRECISION | UMERIC_SCALE | DATETIME_PRECISION |CHARACTER_SET_NAME | COLLATION_NAME | COLUMN_TYPE | COLUMN_KEY | EXTRA | PRIVILEGES | COLUMN_COMMENT | GENERATION_EXPRESSION | SRS_ID |
+---------------+--------------+--------------+---------------------+------------------+----------------+-------------+-----------+--------------------------+------------------------+-------------------+---------------+--------------------+--------------------+-----------------+--------------+------------+-------+---------------------------------+----------------+-----------------------+-------+
| def | sample | demotable189 | CustomerCountryName | 4 | NULL |YES | varchar | 100 | 300 | NULL | NULL | NULL | utf8 | utf8_general_ci | varchar(100) | | |select,insert,update,references | | | NULL |
| def | web | DemoTable | CustomerCountryName | 4 | NULL |YES | varchar | 20 | 60 | NULL | NULL |NULL | utf8 | utf8_unicode_ci | varchar(20) | | |select,insert,update,references | | | NULL |
| def | web | DemoTable | CustomerCountryName | 3 | NULL |YES | varchar | 100 | 300 | NULL | NULL |NULL | utf8 | utf8_unicode_ci | varchar(100) | | |select,insert,update,references | | | NULL |
+---------------+--------------+--------------+---------------------+------------------+----------------+-------------+-----------+--------------------------+------------------------+-------------------+---------------+--------------------+--------------------+-----------------+--------------+------------+-------+---------------------------------+----------------+-----------------------+-------+
3 rows in set (0.68 sec)
在上面,您可以看到“CustomerCountryName”列在3张表中出现。