My. SQL Stored Procedures IF NOT EXISTS()I have been using MSSQL with ASP. NET alot lately, and I really wanted to get some of the benefits of stored procedures into a PHP application I’m writing. Tom, Instead of SQL> select count(*) from emp T1 2 where not exists ( select null from emp T2 where t2.mgr = t1.empno); you could have used SQL> select. Can you please help. This is not working for me. DELIMITER // CREATE PROCEDURE verifyAndUpdate27(in searchName varchar(12), in searchId bigint, inout result int). Here, we will see how to create select, insert, update, delete statements using stored procedure. I’ve known My. SQL has supported them for a while but I guess I was always a bit too lazy to go through old code and convert it. I used the tool Heidi. SQL to make the process a bit more painless. The first stored procedure I attempted to write accepted 3 parameters and based on one of them checks a lookup table, and creates a new value in it if the same value does not already exist. Normally I would use an IF NOT EXISTS clause, which in Microsoft SQL would look like this. CREATE PROCEDURE some. Proc. @Some. Param varchar(5. DECLARE @Some. Id int. IF NOT EXISTS(SELECT (1) FROM lookup. Then you could continue on and insert that id into another table or what have you. Accomplishing the same thing with a My. SQL stored procedure is a bit different. The code below shows how you would accomplish the same task. Step- by- step tutorial on how- to develop the Java Desktop Graphical User Interface (GUI) applications using Net. Beans IDE with database. My. SQL Database and Java Desktop GUI Part 1. Contents: Machine. Pre- requirement. Creating. a Database. Making. a Connection to a Database. Creating. a Table. Inserting. a Sample Data. Creating. a New Java Desktop Project. Running. the Project for the First Time. Customizing. the Project and Testing Its Functionality. In this series of three parts, we will learn how to build Java. GUI application that connected to My. SQL database. This tutorial. The original tutorial can be found at. However there. are wizard to create Java database for Derby database. After finishing the database. Net. Beans. SQL statement to create database is: CREATE DATABASE tid. Change the database name accordingly if you want. When the Net. Beans IDE launched, go to the Services pane, expand the Databases folder and expand the Drivers sub- folder. Making a Connection to a Database. Well, Net. Beans 6. JDBC- ODBC (Windows driver. Microsoft Access/MSSQL), My. SQL, Java and Postgre. SQL database. This means. Thanks to Net. BEans and in the future there will be more drivers for other. Oracle, Sybase etc. A new driver. can be added to Net. Beans using the following steps. And fill in the needed information in the following Figure. Get. the third party JDBC driver for various databases at. Next, select My. SQL (Connector/J. Select Connect Using. Use the following. Key in the My. SQL username as root and its password that you. My. SQL database. The format for the connection string for this driver is. Click the OK button. Using root user is not a good practice. We need to create My. SQL. users and assign appropriate level of permissions and rights to those users. Left the root as the highest administrator similar to. Windows (Administrator) and Linux (root) system access. Click the Remember password. Click OK. If your connection is successful it will be notified (Connection. Click. the OK button. Now we are connected to the My. SQL database through Net. Beans. The following table describes our sample table structure. There are some incompatibilities between. Congrats!!! Next step is to populate the studentrecord with sample data. Inserting a Sample Data. Use the following sample SQL scrip to insert sample data into. You can try creating your own sample data. Launch and use new SQL Command editor or you can overwrite. SQL script. Execute/run the script as done previously. IT'. '1','Malaysia'). INSERT INTO studentrecord VALUES(. Haslina','Mahathir','1. New Smart Village, 1. Nilai, N. Sembilan','MSc. ICT'. '2','Malaysia'). INSERT INTO studentrecord VALUES(. Mohammed','Fajr','1. Pearl Apt, Level 1. Al- Hijr, 4. 52. 00 Abu Dhabi','MSc. Expert System'. INSERT INTO studentrecord VALUES(. Mustar','Mohd Dali','1. Side Village, Kerian, 1. Jawa Barat','MSc. Multi. Media'. '1','Indonesia'). INSERT INTO studentrecord VALUES(. Satkorn','Chengmo','1. Uptown Street #4, Tech Park, 7. Bangkok','MSc. IT'. Thailand'); Any success or fail will be notified in the Output window at. Net. Beans IDE. So don’t worry. A screen snapshot is shown below. Keywords, values. Output. window, this makes our tasks in troubleshooting easier. Verify our data/values insertion by using the following SQL statement. SELECT * FROM studentrecord; A complete My. SQL script for this exercise is given below. IT'. '1','Malaysia'). INSERT INTO studentrecord VALUES(. Haslina','Mahathir','1. New Smart Village, 1. Nilai, N. Sembilan','MSc. ICT'. '2','Malaysia'). INSERT INTO studentrecord VALUES(. Mohammed','Fajr','1. Pearl Apt, Level 1. Al- Hijr, 4. 52. 00 Abu Dhabi','MSc. Expert System'. INSERT INTO studentrecord VALUES(. Mustar','Mohd Dali','1. Side Village, Kerian, 1. Jawa Barat','MSc. Multi. Media'. '1','Indonesia'). INSERT INTO studentrecord VALUES(. Satkorn','Chengmo','1. Uptown Street #4, Tech Park, 7. Bangkok','MSc. IT'. Thailand'); Next step is to create a GUI for our database access and manipulation. Click Next. Put the project name as Student. Record. App. and change the location if needed else just leave as it is. Select the Database Application in the Choose Application Shell pane. Click. Next. Select our previously created database connection in the Database Connection text field. We. only have one table here, so no need to select any as shown in the Database Table: field. In this case. we include all the table columns. You can exclude some columns if needed. Click. Next button. By default the first radio button has been selected. Just leave. as it is. Click Finish button and. Here you are! Our database GUI template! This GUI can be built. Java project. You can view the GUI by clicking the Preview Design icon (). Running the Project for the First Time. Next let see our real GUI in action. You can build first and. In this case we directly run the project (in the process it will be. Java project). Select the Student. Record. App. project folder, right- click mouse and select Run menu. Here is the Real GUI. Try the File menu and its sub- menu. In this case not all the record was. Only the first three and this is our job to find the cause and it. Select any record and test the New (click New button and key- in new data and click Save to update new data), Delete (select a record to be deleted. Delete button) and. Refresh (refresh the connection. All controls supposed to be working else we need. Customizing the GUIClose this application. Let go back to the design page. Select. the Stud Date Of Birth text field. Go to the Properties sheet and click the Binding. Click the ellipses (. All the record displayed but the. Stud Date Of Birth just display the day only. However this program can be said. If we want to add other component either to bind to the database. Select, drag and. Re- run this project again and see the result! Regarding the Date Of Birth (DOB), well we think here is the. Searching in the Internet, the reason is the java. Date is not compatible with the java. Date. Older java. Date package that contains. The new version of this java. The validation and conversion features already. Java Server Faces (JSF) web development. As said before we can fix this problem immediately. Easy solution. is to use a String type. From this simple issue, that is why the database. The structure for a studentrecord table. Column name. Data type. Constraintsstudent.
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