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Can we replace a number with a String in a MySQL result set?
Yes, we can do that using the CASE statement. Let us first create a table −
mysql> create table DemoTable -> ( -> isMarried boolean -> ); Query OK, 0 rows affected (0.76 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(true); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(false); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values(false); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(true); Query OK, 1 row affected (0.19 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
+-----------+ | isMarried | +-----------+ | 1 | | 0 | | 0 | | 1 | +-----------+ 4 rows in set (0.00 sec)
Here is the query to replace a number with a String in a MySQL result set −
mysql> select isMarried, CASE isMarried WHEN 1 THEN 'Married' ELSE 'Not Married' END AS Status from DemoTable -> ;
Output
+-----------+-------------+ | isMarried | Status | +-----------+-------------+ | 1 | Married | | 0 | Not Married | | 0 | Not Married | | 1 | Married | +-----------+-------------+ 4 rows in set (0.00 sec)
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