SQL Server data table field custom Custom Data Format method, SQL Server

SQL Server data table field custom Custom Data Format method, SQL Server

This document describes how to customize the Custom Data Format of SQL Server data table fields. We will share this with you for your reference. The details are as follows:

-- Modify the field CompanyId In the TABLE SYS_Company to customize the user-added constraint alter table [dbo]. [SYS_Company] Add Constraint DF_SYS_Company_CompanyIdDEFAULT ([dbo]. [f_PrimaryCode_SYS_Company] () FOR [CompanyId] -- Go -- delete the Constraint Alter table SYS_LogInfo Drop Constraint DF_SYS_Company_CompanyId -- create the field CompanyId Custom Auto-increment Constraint (FOR example, CY00000001, the length is bit, the first two digits are custom numbers, and the last digit is the serial number.) Create function [dbo]. [f_PrimaryCode_SYS_Company] () Returns Char (10) AsBegin RETURN (SELECT 'cy '+ RIGHT (100000001 + ISNULL (RIGHT (MAX (CompanyId), 8), 0), 8) FROM SYS_Company WITH (XLOCK, PAGLOCK) End

Effect:

I hope this article will help you design SQL Server database programs.