Category: MySQL Queries

Sometimes we want to insert data of one table into the other table in the same or different database. It is not very easy to enter these data using the INSERT query manually. We can optimize this process with the use of MySQL INSERT INTO SELECT query. It allows us to populate the MySQL tables…

Insert Ignore statement in MySQL has a special feature that ignores the invalid rows whenever we are inserting single or multiple rows into a table. We can understand it with the following explanation, where a table contains a primary key column. The primary key column cannot stores duplicate values into a table. For example, student_roll_number should always be unique…

The Insert on Duplicate Key Update statement is the extension of the INSERT statement in MySQL. When we specify the ON DUPLICATE KEY UPDATE clause in a SQL statement and a row would cause duplicate error value in a UNIQUE or PRIMARY KEY index column, then updation of the existing row occurs. In other words, when we…

The REPLACE statement in MySQL is an extension of the SQL Standard. This statement works the same as the INSERT statement, except that if an old row matches the new record in the table for a PRIMARY KEY or a UNIQUE index, this command deleted the old row before the new row is added. This…

The SELECT statement in MySQL is used to fetch data from one or more tables. We can retrieve records of all fields or specified fields that match specified criteria using this statement. It can also work with various scripting languages such as PHP, Ruby, and many more. SELECT Statement Syntax It is the most commonly used SQL query. The general…

MySQL DELETE statement is used to remove records from the MySQL table that is no longer required in the database. This query in MySQL deletes a full row from the table and produces the count of deleted rows. It also allows us to delete more than one record from the table within a single query, which…

MySQL UPDATE query is a DML statement used to modify the data of the MySQL table within the database. In a real-life scenario, records are changed over a period of time. So, we need to make changes in the values of the tables also. To do so, it is required to use the UPDATE query.…

MySQL INSERT statement is used to store or add data in MySQL table within the database. We can perform insertion of records in two ways using a single query in MySQL: Syntax: The below is generic syntax of SQL INSERT INTO command to insert a single record in MySQL table: In the above syntax, we first have to specify…

The constraint in MySQL is used to specify the rule that allows or restricts what values/data will be stored in the table. They provide a suitable method to ensure data accuracy and integrity inside the table. It also helps to limit the type of data that will be inserted inside the table. If any interruption…

A list of commonly used MySQL queries to create database, use database, create table, insert record, update record, delete record, select record, truncate table and drop table are given below. 1) MySQL Create Database MySQL create database is used to create database. For example 2) MySQL Select/Use Database MySQL use database is used to select…