Do not prefix table name with field name like user_name. Instead, use user or username.
If you prefix table name, then there may be a chance of ambiguity, so avoid prefixing table name.
Let us first create a table −
mysql> create table user -> ( -> username varchar(20), -> password varchar(20) -> ); Query OK, 0 rows affected (0.66 sec)
Insert some records in the table using insert command −
mysql> insert into user values('John','J_635');
Query OK, 1 row affected (0.34 sec)
mysql> insert into user values('Carol','Carol2212');
Query OK, 1 row affected (0.16 sec)
mysql> insert into user values('David','@12345678');
Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −
mysql> select * from user;
This will produce the following output −
+----------+-----------+ | username | password | +----------+-----------+ | John | J_635 | | Carol | Carol2212 | | David | @12345678 | +----------+-----------+ 3 rows in set (0.00 sec)