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.
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