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Get the type of a variable in MySQL?
You cannot get the type of variable in MySQL. Cast the type of variable into another using CAST operator. The syntax is as follows −
SET @yourVariableName:=’anyValue’
Use the CAST operator to cast to another type. The syntax is as follows −
SELECT CAST( @yourVariableName AS SIGNED);
To understand the above syntax, let us cast to another type.
Case 1: String to unsigned −
mysql> set @StringToInt:='12345'; Query OK, 0 rows affected (0.00 sec)
The query is as follows to another type −
mysql> select CAST(@StringToInt as UNSIGNED);
The following is the output −
+--------------------------------+ | CAST(@StringToInt as UNSIGNED) | +--------------------------------+ | 12345 | +--------------------------------+ 1 row in set (0.00 sec)
Case 2: Int to char
The query is as follows −
mysql> set @IntTochar:=CAST(65 as CHAR); Query OK, 0 rows affected (0.00 sec)
The query is as follows −
mysql> select @IntTochar;
The following is the output −
+------------+ | @IntTochar | +------------+ | 65 | +------------+ 1 row in set (0.00 sec)
Updated on: 30-Jul-2019
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