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Select particular type of columns beginning with a certain letter and concatenate the names
For particular type of columns beginning with a certain letter, use LIKE. To concatenate the column names, use GROUP_CONCAT() as in the below syntax −
SELECT group_concat(COLUMN_NAME separator ' , ') FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = "yourTableName" AND table_schema = "yourDatabaseName" AND column_name LIKE "yourSpecificLetter%";
Let us first create a table −
mysql> create table DemoTable671( ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, ClientName varchar(100), ClientAge int, ClientAddress varchar(200), ClientCountryName varchar(100) ); Query OK, 0 rows affected (0.62 sec)
Following is the query to select particular type of columns beginning with a certain letter and fetch all the column names for concatenation −
mysql> SELECT group_concat(COLUMN_NAME separator ' , ') FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = "DemoTable671" AND table_schema = "web" AND column_name LIKE "Cl%";
This will produce the following output −
+-----------------------------------------------------------------------+ | group_concat(COLUMN_NAME separator ' , ') | +-----------------------------------------------------------------------+ | ClientId , ClientName , ClientAge , ClientAddress , ClientCountryName | +-----------------------------------------------------------------------+ 1 row in set (0.00 sec)
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