SQL Alter Column Name

sql alter column name

SQL Alter Column Name

SQL Alter Column Name

     

Alter Column Name in SQL is used to change or modify the name of column in a table.

Understand with Example

The Tutorial explain you a simple example on SQL Alter Column Name. In this Example, create a table 'Stu_Table' using create statement. The insert into help you to add the records into created table 'Stu_Table'. The select statement retain you the records from table 'Stu_Table'. The ALTER  table statement in SQL is used to modify the table 'Stu_Table'.

Create Table Stu_Table

 

 

 

create table Stu_Table(Stu_Id integer(2), Stu_Name varchar(15), 
Stu_Class  varchar(10) )

Insert data into Stu_Table 

insert into Stu_Table (Stu_Id, Stu_Name) values(1,'Komal');
insert into Stu_Table (Stu_Id, Stu_Name) values(2,'Ajay');
insert into Stu_Table (Stu_Id, Stu_Name) values(3,'Rakesh');
insert into Stu_Table (Stu_Id, Stu_Name) values(4,'Bhanu');
insert into Stu_Table (Stu_Id, Stu_Name) values(5,'Santosh');

Stu_Table

+--------+----------+-----------+
| Stu_Id | Stu_Name | Stu_Class |
+--------+----------+-----------+
| 1      | Komal    | 10        |
| 2      | Ajay     | 10        |
| 3      | Rakesh   | 10        |
| 4      | Bhanu    | 10        |
| 5      | Santosh  | 10        | 
+--------+----------+-----------+

Syntax

The ALTER  table statement in SQL is used to modify the table 'Stu_Table' and change keyword change the name of field to new  name of field. The syntax used for Alter Table is given below:  

Alter table table_name change old_column_name  new_column_name type size

Query

The Alter Table alter the table 'Stu_Table'. The change keyword change the column name of  Stu_Id to Id in table 'Stu_Table'.

Alter table Stu_Table change Stu_Id Id varchar(10)

Stu_Table 

+--------+----------+-----------+
| Id     | Stu_Name | Stu_Class |
+--------+----------+-----------+
| 1      | Komal    | 10        |
| 2      | Ajay     | 10        |
| 3      | Rakesh   | 10        |
| 4      | Bhanu    | 10        |
| 5      | Santosh  | 10        | 
+--------+----------+-----------+

Tutorials

  1. Quartz Tutorial
  2. Introduction to Quartz Scheduler
  3. Download Quartz Job Scheduler
  4. Hello World Quartz Scheduler
  5. Jobs & Triggers
  6. More About Triggers
  7. More About Simple Trigger
  8. More About the CronTrigger
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  10. Implementing more than one Job Details and Triggers
  11. Scheduler Shutdown Example
  12. TriggerListeners and JobListeners
  13. JobStores
  14. Configuration, Resource Usage and StdSchedulerFactory
  15. Establish a Connection with MySQL Database
  16. Advance (Enterprise) Features
  17. Quartz Tutorial
  18. Aggregate Functions in SQL, SQL Tutorial
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  21. Backup selected records into txt file
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  24. Create After Insert Trigger in SQL
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  27. Create Delete Trigger in SQL
  28. Create a Simple Procedure
  29. Create After Update Trigger in SQL
  30. Create Database in SQL,SQL Tutorial
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  32. Declare Cursors in SQL
  33. The DELETE Statement, SQL Tutorial
  34. SQL SELECT DISTINCT Statement
  35. Drop Index
  36. Drop Table
  37. Close Cursors in SQL
  38. Use HANDLER Statement in Cursors
  39. Insert Data From File
  40. The INSERT INTO Statement, SQL Tutorial