- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Display an error while inserting duplicate records in a MySQL table
For this, you can use UNIQUE KEY. Let us first create a table −
mysql> create table DemoTable1553 -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> EmployeeName varchar(20), -> EmployeeSalary int -> ); Query OK, 0 rows affected (0.47 sec)
Here is the query to add unique key −
mysql> alter table DemoTable1553 add unique(EmployeeSalary); Query OK, 0 rows affected (0.53 sec) Records: 0 Duplicates: 0 Warnings: 0
Insert some records in the table using insert command −
mysql> insert into DemoTable1553(EmployeeName,EmployeeSalary) values('Chris',45000);
Query OK, 1 row affected (0.21 sec)
mysql> insert into DemoTable1553(EmployeeName,EmployeeSalary) values('David',35000);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1553(EmployeeName,EmployeeSalary) values('Sam',25000);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable1553(EmployeeName,EmployeeSalary) values('Carol',45000);
ERROR 1062 (23000): Duplicate entry '45000' for key 'EmployeeSalary'Display all records from the table using select statement −
mysql> select * from DemoTable1553;
This will produce the following output −
+------------+--------------+----------------+ | EmployeeId | EmployeeName | EmployeeSalary | +------------+--------------+----------------+ | 1 | Chris | 45000 | | 2 | David | 35000 | | 3 | Sam | 25000 | +------------+--------------+----------------+ 3 rows in set (0.00 sec)
Updated on 12-Dec-2019 06:29:34
- Related Questions & Answers
- Format date while inserting records in MySQL
- Can we use INTERVAL keyword while inserting date records in a MySQL table?
- Find and display duplicate records in MySQL?
- Inserting records into a MySQL table using PreparedStatement in Java?
- Escaping quotes while inserting records in MongoDB?
- Ignore MySQL INSERT IGNORE statement and display an error if duplicate values are inserted in a table
- No error while inserting record in child table with no match in master table in SAP
- Inserting Records into Table using Node
- Display table records from a stored procedure in MySQL
- How to fix the incorrect datetime value while inserting in a MySQL table?
- How to delete all the duplicate records in a MySQL table?
- Display selected records from a MySQL table with IN() operator
- MySQL query to display the count of distinct records from a column with duplicate records
- How to avoid inserting duplicate rows in MySQL?
- How to delete a single value from a MySQL table with duplicate records?
Advertisements