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I have a table Orders with the following fields:
Id | SubTotal | Tax | Shipping | DateCreated
The Id column is set to autoincrement(1,1).
This is to be used in an E-commerce storefront. Sometimes a current E-commerce store is migrated to my platform and they already have orders - which could mean that their current Order.Id is, for example, 9586.
I want to have the autoincrement field start from that value.
How can I do this?
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In MySQL, the syntax to change the starting value for an AUTO_INCREMENT column using the ALTER TABLE statement is: ALTER TABLE table_name AUTO_INCREMENT = start_value; table_name. The name of the table whose AUTO_INCREMENT value you wish to change.
Step 1 : Create a table named school. CREATE TABLE school ( student_id INT IDENTITY, student_name VARCHAR(200), marks INT ); Here, the 'student_id' column of the table starts from 1 as the default value of seed is 1 and each row is incremented by 1. Step 2 : Insert some value into a table.
Changing the identity increment value Unfortunately there's no easy way to change the increment value of an identity column. The only way to do so is to drop the identity column and add a new column with the new increment value.
No. A primary key must be unique and that has to be 100% guaranteed, and NON NULL A primary key should be stable if ever possible and not change.
From Resetting SQL Server Identity Columns:
Retrieving the identity for the table Employees:
DBCC checkident ('Employees') Repairing the identity seed (if for some reason the database is inserting duplicate identities):
DBCC checkident ('Employees', reseed) Changing the identity seed for the table Employees to 1000:
DBCC checkident ('Employees', reseed, 1000) The next row inserted will begin at 1001.
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