Selecting and displaying only some rows from a column in a MySQL table

Let us first create a table −

mysql> create table DemoTable625 (
   StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,StudentFirstName varchar(100),StudentScore int
);
Query OK, 0 rows affected (1.01 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable625(StudentFirstName,StudentScore) values('John',98);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable625(StudentFirstName,StudentScore) values('Chris',39);
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable625(StudentFirstName,StudentScore) values('Bob',41);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable625(StudentFirstName,StudentScore) values('David',40);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable625(StudentFirstName,StudentScore) values('Robert',52);
Query OK, 1 row affected (0.18 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable625;

This will produce the following output −

+-----------+------------------+--------------+
| StudentId | StudentFirstName | StudentScore |
+-----------+------------------+--------------+
|         1 | John             |           98 |
|         2 | Chris            |           39 |
|         3 | Bob              |           41 |
|         4 | David            |           40 |
|         5 | Robert           | 52 |
+-----------+------------------+--------------+
5 rows in set (0.00 sec)

Here is the query to select and display only some rows −

mysql> select *from DemoTable625 where StudentFirstName NOT IN(
   select StudentFirstName from DemoTable625
   where StudentScore < 50
);

This will produce the following output −

+-----------+------------------+--------------+
| StudentId | StudentFirstName | StudentScore |
+-----------+------------------+--------------+
|         1 | John             |           98 |
|         5 | Robert           |           52 |
+-----------+------------------+--------------+
2 rows in set (0.00 sec)