Difference between intvalue='1' and intvalue=1 in MySQL?

You need to use intvalue=1. The statement intvalue=’1’ is internally converted to cast(‘1’ as int) by MySQL.

Let us first create a table −

mysql> create table DemoTable1566
   -> (
   -> intvalue int
   -> );
Query OK, 0 rows affected (0.64 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable1566 values(1);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable1566 values(55);
Query OK, 1 row affected (0.08 sec)
mysql> insert into DemoTable1566 values(75);
Query OK, 1 row affected (0.32 sec)
mysql> insert into DemoTable1566 values(90);
Query OK, 1 row affected (0.19 sec)

Display all records from the table using select statement −

mysql> select * from DemoTable1566;

This will produce the following output −

+----------+
| intvalue |
+----------+
|        1 |
|       55 |
|       75 |
|       90 |
+----------+
4 rows in set (0.00 sec)

Here is the query to implement intvalue=1 −

mysql> select * from DemoTable1566 where intvalue=1;

This will produce the following output −

+----------+
| intvalue |
+----------+
|        1 |
+----------+
1 row in set (0.00 sec)

Here is the query to intvalue=’1’ −

mysql> select * from DemoTable1566 where intvalue='1';

This will produce the following output −

+----------+
| intvalue |
+----------+
|        1 |
+----------+
1 row in set (0.00 sec)