How do I write not greater than in a MySQL query?

The not greater than in a query can be written simply like less than or equal to ( <=). The syntax is as follows −

select * from yourTableName where yourColumnName<=yourColumnName;

Let us first create a table −

mysql> create table DemoTable1480
   -> (
   -> StudentName varchar(40),
   -> StudentMarks int
   -> );
Query OK, 0 rows affected (0.50 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable1480 values('Chris',78);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1480 values('Bob',45);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable1480 values('John',67);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1480 values('Adam',56);
Query OK, 1 row affected (0.14 sec)

Display all records from the table using select statement −

mysql> select * from DemoTable1480;

This will produce the following output −

+-------------+--------------+
| StudentName | StudentMarks |
+-------------+--------------+
| Chris       |           78 |
| Bob         |           45 |
| John        |           67 |
| Adam        |           56 |
+-------------+--------------+
4 rows in set (0.00 sec)

Following is the query to write not greater than in a MySQL query −

mysql> select * from DemoTable1480 where StudentMarks <=65;

This will produce the following output −

+-------------+--------------+
| StudentName | StudentMarks |
+-------------+--------------+
| Bob         |           45 |
| Adam        |           56 |
+-------------+--------------+
2 rows in set (0.00 sec)