example of before insert trigger in mysql

example of before insert trigger in mysql

Hi,

How to create a simple before insert trigger in MySQL?

Thanks

View Answers

April 25, 2016 at 2:04 PM

Hi,

The before insert trigger is executed before saving the data into database. Trigger is stored in MySQL database server and executed on the server itself. So, its very fast.

First create table:

create table student(
    id int,
    student_name varchar(15),
    subject1 int,
    subject2 int,
    subject3 int,
    subject4 int,
    subject5 int,
    total int,
    per float,
    status varchar(15)
    );

Now create the trigger:

delimiter $$
CREATE TRIGGER stu_insert
Before Insert ON student FOR EACH ROW
BEGIN
    set new.total = new.subject1 + new.subject2 +new.subject3 +
            new.subject4 +new.subject5;
    set new.per = new.total/5;
    if new.per<33 then 
        set new.status="fail";
    elseif new.per>=33 and new.per<45 then
        set new.status="3rd Div";
    elseif new.per>=45 and new.per<60 then
        set new.status="2nd  Div";
    else
        set new.status="1st Div";
    end if;
END$$
delimiter ;

Now you can insert the data and check the data inserted into database. Here is the sql to insert sample data:

insert into student(id, student_name, subject1, subject2, subject3, subject4, subject5)
             values (1, 'AAA', 6, 6, 6, 6, 6);

insert into student(id, student_name, subject1, subject2, subject3, subject4, subject5)
             values (2, 'BBB', 33, 33, 33, 33, 40);

insert into student(id, student_name, subject1, subject2, subject3, subject4, subject5)
             values (2, 'CCC', 45, 45, 45, 45, 50);

insert into student(id, student_name, subject1, subject2, subject3, subject4, subject5)
             values (2, 'DDD', 67, 67, 67, 67, 67);

You can use the following query to query the data from database:

select * from student;

Thanks









Related Tutorials/Questions & Answers:
example of before insert trigger in mysql
example of before insert trigger in mysql  Hi, How to create a simple before insert trigger in MySQL? Thanks   Hi, The before insert... the trigger: delimiter $$ CREATE TRIGGER stu_insert Before Insert ON student
Create Before Insert Trigger in SQL
Create Before Insert Trigger in SQL       The Create Before Insert Trigger in SQL fires the trigger..._TO_REPLACE_1 The given Tutorial describe you a code on 'Create Before Insert Trigger
Advertisements
Create Before Insert Trigger in SQL
Create Before Insert Trigger in SQL       The Create Before Insert Trigger in SQL fires the trigger before we insert the value into the table. Understand with ExampleADS
Mysql Trigger After Insert
_TO_REPLACE_1 The Tutorial illustrate an example from Mysql Trigger After Insert... Mysql Trigger After Insert       Mysql Trigger After Insert fired the trigger after you
Mysql Time Trigger
from Mysql Time Trigger. To grasp this example we create a table 'Stu_Table1... Mysql Time Trigger       Mysql Time Trigger is fired when a specified event is occurred
Mysql Time Trigger
from Mysql Time Trigger. To grasp this example we create a table 'Stu_Table1... Mysql Time Trigger       Mysql Time Trigger is fired when a specified event is occurred
Trigger
Trigger After Insert The Tutorial illustrate an example from Mysql... an example from 'Trigger After Delete' in Mysql. To understand... Trigger after Update The Tutorial understand an example from 'Mysql
Create Before Update Trigger in SQL
'Create Before Update Trigger in SQL' . To understand this example we...)); Create Trigger Stu_Insert The Before Trigger fires on a table...'. delimiter $$ CREATE TRIGGER stu_insert Before Insert
trigger after insert for deletion
trigger after insert for deletion   String query2 = "create TRIGGER trig after insert on "cart" + " FOR EACH ROW... = st1.executeUpdate( query2); i have to do the above trigger operation, but i'm stuck
MySQL After Trigger
MySQL After Trigger This example illustrates how to create the trigger...' and 'description'. A trigger is defined to activate when an INSERT, DELETE, or UPDATE... automatically inserted in the roseindia_log table by the trigger. Query insert
Create Before Update Trigger in SQL
an example from 'Create Before Update Trigger in SQL' . To understand...'. delimiter $$ CREATE TRIGGER stu_insert Before Insert ON stu_table... Create Before Update Trigger in SQL   
throw exception in mysql trigger
throw exception in mysql trigger  throw exception in mysql trigger
Create After Insert Trigger in SQL
illustrate a example from 'Create After Insert Trigger in SQL'. In this Example... Create After Insert Trigger in SQL   ..._id VARCHAR(15), description VARCHAR(100)); Create Trigger Stu_Insert
trigger
trigger  write a trigger program before insert into salary that it must not below Rs 1000
trigger
trigger  write a trigger program before insert into salary that it must not below Rs 1000
Mysql Trigger After Delete
The Tutorial illustrate an example from 'Trigger After Delete' in Mysql. To understand... Mysql Trigger After Delete       Trigger in Mysql fired trigger automatically after you
Mysql Trigger after Update
understand an example from 'Mysql Trigger after Update'. To grasp 'Mysql...Mysql Trigger after Update       Mysql Trigger after  Update fired automatically after we perform
Mysql Insert
Mysql Insert       Mysql Insert is used to insert the records or rows to the table. Understand with ExampleADS_TO_REPLACE_1 The Tutorial illustrate an example from 'Mysql Insert
Create Delete Trigger in SQL
;    Create Delete Trigger in SQL fire this trigger before... Trigger in SQL'. To understand this example, we create a table 'Stu_Table... trigger is fired before we perform delete operation on  records into table
Create After Insert Trigger in SQL
illustrate a example from 'Create After Insert Trigger in SQL...;How to create insert after trigger in MySQL?" Create Trigger Stu_InsertADS...Create After Insert Trigger in SQL   
insert images into a Mysql database
insert images into a Mysql database  How can I insert images into a Mysql database
can i use trigger to insert data within a time period ?
can i use trigger to insert data within a time period ?  Hello sir, i... this trigger concept the data will be insert to each Employee's ID. Plz sir help me regarding this problem.how to solve this issue and how i will use this trigger
insert query in mysql
insert query in mysql  insert query in mysql not working   [INSERT INTO Birthdays(firstname, lastname, birthday, group) VALUES('Sam','Smith','June','Junior
Example of Cron Trigger
Example of Cron Trigger     ... Trigger example and by this, you can better understand the working of cron trigger... are just creating a Quartz application with the help of cron trigger. For this, we
What is Trigger?
What is Trigger?  What is Trigger?   Hi, A trigger... in the database server.The event can be any event including INSERT, UPDATE and DELETE. The difference between a trigger and a stored procedure
Servlet Example To Insert Mysql Clob Data
Servlet Example To Insert Mysql Clob Data    This example shows how to insert CLOB data in the database. In our... how to insert data of CLOB type in mysql database through the servlet program
How to insert image in MySQL database using sql query?
Insert image in MySQL database using sql query  ... in MySQL database and then used the query to insert the data... tutorial of "How to insert image in MySQL database using sql query?": So
Create After Update Trigger in SQL
Create After Update Trigger in SQL       After Trigger in SQL is fired before update... The Tutorial illustrate an example from 'Create After Update Trigger in SQL
Mysql Multiple Date Insert
The Section of Tutorial illustrate an example from 'Mysql Multiple Column Insert... Mysql Multiple Date Insert       Mysql Multiple Column Insert is used to add or insert
Mysql Multiple Date Insert
of Tutorial illustrate an example from 'Mysql Multiple Column Insert... Mysql Multiple Date Insert       Mysql Multiple Column Insert is used to add or insert
MySQL PHP Insert
MySQL PHP Insert       Mysql PHP Insert is used to execute the Mysql function ( ) insert.... Understand with ExampleADS_TO_REPLACE_1 The Tutorial illustrate an example on MySQL
insert excel sheet into mysql as a table
insert excel sheet into mysql as a table  sir, i want to import an excel sheet into mysql5.0 database as in the table format using tomcat 6.0 by jsp
trigger
trigger  write a trigger to see every manager must be highest salary
SQL Bulk Insert Example
SQL Bulk Insert Example       SQL Bulk Insert Example is used to insert a bulk record... illustrate an Example to create SQL Bulk Insert .To grasp this example we create
How to insert data into MySQL Table?
How to insert data into MySQL Table?  Hi, How to insert the data into MySQL Database? Please explain me with the examples and videos thanks. Thanks   Hi, The insert into query is used to insert the data into MySQL
how to insert excel file into mysql datbase in servlet
how to insert excel file into mysql datbase in servlet  emphashow to insert excel file into mysql datbase inservletized text
SQL Bulk Insert Example
SQL Bulk Insert Example       SQL Bulk Insert Example is used to insert a bulk record to the table... to create SQL Bulk Insert .To grasp this example we create a table 'Stu
How to change image size before adding to mysql using jsp
How to change image size before adding to mysql using jsp  I want to upload an image to MySQL DB, before inserting the image I want to change... for example, i want to set image size 300x300. Plz help me out
Create Delete Trigger in SQL
;    Create Delete Trigger in SQL fire this trigger before... Trigger in SQL'. To understand this example, we create a table 'Stu_Table.... The Delete trigger is fired before we perform delete operation on 
JSP Radio Button MySQL insert - JSP-Servlet
with the code to store radio button data and checkbox data to MySQL table. For example...JSP Radio Button MySQL insert  Hi, I have an HTML form which has a couple of radio buttons for example (gender: male/female) and some check boxes
how to update specific row in on update key in the Navicat for mysql trigger
how to update specific row in on update key in the Navicat for mysql trigger   Blockquote insert into two(name, date) select name, curdate() from one on duplicate key update name=values(name
JDBC: Insert Records Example
JDBC: Insert Records Example In this section, you will learn how to insert...("Insert Records Example..."); Connection con = null; String url...; : Insert Records Example... Record inserted successfully
Unable to Insert Arabic words in mysql table
Unable to Insert Arabic words in mysql table  I have I java program that I want to insert arabic letters in mysql. Do you have any idea about the configuration of mysql that accepts arabic charcters.   in jsp use
how to insert the selected item of combobox in mysql - XML
how to insert the selected item of combobox in mysql  hi, i have to insert the selected item from combobox into MYSQL database.pls provide... of combobox in mxml.how to insert selecteditem in database. pls suggest me i have
Order by example in MySQL
Order by example in MySQL  Hi, How to use the order by in MySQL? Thanks   Hi, The order by clause in used in MySQL for ordering the result in ascending or descending order. For example following query order the data
Example of sorting results in MySQL
Example of sorting results in MySQL  Hi, How to sort the results in MYSQL query? Thanks   Hi, You can use the order by clause in SQL...: insert into employee values(01,'Ashok','1981-12-20'); insert into employee
insert name city and upload image in database using mysql and jsp
insert name city and upload image in database using mysql and jsp   insert name city and upload image in database using mysql and jsp
Distinct and Limit example in MySQL
Distinct and Limit example in MySQL  Hi, How to use the distinct and limit with SQL query in MySQL? Thanks   Hi, Here is example...) from email where email_count >100; Here is example of limit in MySQL
insert name city image in database using mysql and jsp
insert name city image in database using mysql and jsp  how to insert name ,city and image in database in mysql and jsp   Here is an example in jsp that insert name, city and image to database. <%@ page import
php mysql fetch array example
php mysql fetch array example  How to fetch data from mysql and store it into an array in PHP? Please post an example. Thanks in Advance

Ads