Updating rows in mysql

A trigger is a set of actions that are run automatically when a specified change operation (SQL INSERT, UPDATE, or DELETE statement) is performed on a specified table.

Triggers are useful for tasks such as enforcing business rules, validating input data, and keeping an audit trail.

It supports the declaration of local variables, statements to control the flow of the procedure, assignment of expression results to variables, and error handling.

updating rows in mysql-7updating rows in mysql-65

You can convert multiple tables in one go from MS SQL Server to My SQL or from MS SQL Server to My SQL database.

First install My SQL, it doesn’t matter whether this is on a Windows, Mac or Linux machine.

Then we can go ahead and create our database and add a few records with the following commands: create database csharpdb; use csharpdb; CREATE TABLE people (id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, name VARCHAR(50), employed TINYINT(1) NOT NULL DEFAULT 0, jobtitle VARCHAR(50), age INT(3)); INSERT INTO people (name, employed, jobtitle, age) VALUES ("Rimmer", 1, "2nd Technician", 28); INSERT INTO people (name, employed, jobtitle, age) VALUES ("Lister", 1, "3rd Technician", 25); INSERT INTO people (name, employed, jobtitle, age) VALUES ("Cat", 0, null, 15); INSERT INTO people (name, employed, jobtitle, age) VALUES ("Kryten", 1, "Mechanoid", 540); GRANT ALL ON csharpdb.* to 'csharpuser'@'%' IDENTIFIED BY 'password'; ---------- ------------------ ------ ----- --------- ---------------- | Field | Type | Null | Key | Default | Extra | ---------- ------------------ ------ ----- --------- ---------------- | id | int(10) unsigned | NO | PRI | NULL | auto_increment | | name | varchar(50) | YES | | NULL | | | employed | tinyint(1) | NO | | 0 | | | jobtitle | varchar(50) | YES | | NULL | | | age | int(3) | YES | | NULL | | ---------- ------------------ ------ ----- --------- ---------------- 5 rows in set (0.08 sec) mysql ---- -------- ---------- ---------------- ------ | id | name | employed | jobtitle | age | ---- -------- ---------- ---------------- ------ | 1 | Rimmer | 1 | 2nd Technician | 28 | | 2 | Lister | 1 | 3rd Technician | 25 | | 3 | Cat | 0 | NULL | 15 | | 4 | Kryten | 1 | Mechanoid | 540 | ---- -------- ---------- ---------------- ------ 4 rows in set (0.00 sec) For this article we will be connecting to My SQL using ODBC though the My SQL ODBC Connector. NET and needs installing but all the other functionality that you need is contained within the . There are two ways that you can use the ODBC connector.

For this article, we are going to use `employee` table mentioned below.

SQL commands for creating the table, inserting data and, truncating are available here.