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Make all column names lower case in MySQL with a single query
Let us first create a −
mysql> create table DemoTable1 -> ( -> StudentFirstName varchar(20), -> StudentLastName varchar(20), -> StudentAge int, -> StudentCountryName varchar(20) -> ); Query OK, 0 rows affected (4.20 sec)
Let us now make all column names lower case in MySQL −
mysql> select concat('alter table ', table_name, ' change `', column_name, '` `',
-> lower(column_name), '` ', column_type, ';')
-> from information_schema.columns where table_schema = 'demo';This will produce the following output −
+-----------------------------------------------------------------------------------------------------------------+
| concat('alter table ', table_name, ' change `', column_name, '` `', lower(column_name), '` ', column_type, ';') |
+-----------------------------------------------------------------------------------------------------------------+
| alter table demotable1 change `StudentFirstName` `studentfirstname` varchar(20); |
| alter table demotable1 change `StudentLastName` `studentlastname` varchar(20); |
| alter table demotable1 change `StudentAge` `studentage` int(11); |
| alter table demotable1 change `StudentCountryName` `studentcountryname` varchar(20); |
| alter table mytable change `MyEuroColumn` `myeurocolumn` varchar(5); |
+-----------------------------------------------------------------------------------------------------------------+
5 rows in set (0.00 sec)
Updated on: 11-Nov-2019
988 Views
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