Insert a unique row into the MySQL 'jobs' table for the 'job_id' column

MySQL insert into Statement: Exercise-8 with Solution

8. Write a MySQL query to insert one row in jobs table to ensure that no duplicate value will be entered in the job_id column.

Create the table jobs.

CREATE TABLE IF NOT EXISTS jobs ( 
JOB_ID integer NOT NULL UNIQUE PRIMARY KEY, 
JOB_TITLE varchar(35) NOT NULL, 
MIN_SALARY decimal(6,0)
);

INSERT INTO jobs VALUES(1001,'OFFICER',8000);

mysql> SELECT * FROM jobs;
+--------+-----------+------------+
| JOB_ID | JOB_TITLE | MIN_SALARY |
+--------+-----------+------------+
|   1001 | OFFICER   |       8000 |
+--------+-----------+------------+

Sample Solution:

-- Inserting a new record into the 'jobs' table
INSERT INTO jobs VALUES(1001, 'OFFICER', 8000);

Let execute the above code in MySQL command prompt.

mysql> INSERT INTO jobs VALUES(1001,'OFFICER',8000);
ERROR 1062 (23000): Duplicate entry '1001' for key 'PRIMARY'

Explanation:

Here's a breakdown of the above MySQL query:

• INSERT INTO jobs: Specifies the insertion operation into the 'jobs' table.
• VALUES(1001, 'OFFICER', 8000): Specifies the values to be inserted into the columns of the 'jobs' table. In this case:
• 1001 is inserted into the 'JOB_ID' column.
• 'OFFICER' is inserted into the 'JOB_TITLE' column.
• 8000 is inserted into the 'MIN_SALARY' column.

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous:Write a MySQL query to insert one row in jobs table to ensure that no duplicate value will be entered in the job_id column.
Next:Write a MySQL query to insert a record into the table countries to ensure that, a country_id and region_id combination will be entered once in the table.