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Display substring in MySQL if the string is less than a specific length or display a custom message if it is more?
For this, you can use substring() function in MySQL. For conditions, use MySQL CASE statement. Let us first create a −
mysql> create table DemoTable1402 -> ( -> EmployeeName varchar(40) -> ); Query OK, 0 rows affected (0.62 sec)
Insert some records in the table using insert −
mysql> insert into DemoTable1402 values('Adam Smith');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1402 values('Chris Brown');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable1402 values('David Miller');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1402 values('Carol Taylor');
Query OK, 1 row affected (0.10 sec)Display all records from the table using select −
mysql> select * from DemoTable1402;
This will produce the following output −
+--------------+ | EmployeeName | +--------------+ | Adam Smith | | Chris Brown | | David Miller | | Carol Taylor | +--------------+ 4 rows in set (0.00 sec)
Here is the query to display substring in MySQL if the string is less than a specific length or display a custom message if it is more −
mysql> select *, case when char_length(EmployeeName) <=11 then substring(EmployeeName,1,5) -> else 'EmployeeName is greater than 11' -> end as Result -> from DemoTable1402;
This will produce the following output −
+--------------+---------------------------------+ | EmployeeName | Result | +--------------+---------------------------------+ | Adam Smith | Adam | | Chris Brown | Chris | | David Miller | EmployeeName is greater than 11 | | Carol Taylor | EmployeeName is greater than 11 | +--------------+---------------------------------+ 4 rows in set (0.04 sec)
Updated on: 11-Nov-2019
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