Sql server 生成字母数字客户ID
我正在从遗留系统迁移数据。为了适应我们的新系统,需要生成适当的客户ID。我正在寻找一种方法,部分基于客户的姓氏生成唯一的字母数字ID。使用的惯例是客户姓氏的前3个字母后跟3位标识符。例如:Sql server 生成字母数字客户ID,sql-server,Sql Server,我正在从遗留系统迁移数据。为了适应我们的新系统,需要生成适当的客户ID。我正在寻找一种方法,部分基于客户的姓氏生成唯一的字母数字ID。使用的惯例是客户姓氏的前3个字母后跟3位标识符。例如: Smith, John = SMI001 Smith, Robert = SMI002 Jones, David = JON001 新的系统将自动生成新的客户id的前进,我只需要一个脚本运行一次对数据库我甚至不知道从哪里开始。谢谢你能提供的任何帮助 测试数据 DECLARE @Table TABLE(Las
Smith, John = SMI001
Smith, Robert = SMI002
Jones, David = JON001
新的系统将自动生成新的客户id的前进,我只需要一个脚本运行一次对数据库我甚至不知道从哪里开始。谢谢你能提供的任何帮助 测试数据
DECLARE @Table TABLE(LastName NVARCHAR(50), FirstName NVARCHAR(50), ID NVARCHAR(50))
INSERT INTO @Table(LastName, FirstName) VALUES
('Smith', 'John'),('Smith', 'Robert'),('Jones', 'David'),('Smith', 'John'),
('Smith', 'John'),('Smith', 'Robert'),('Jones', 'David'),('Smith', 'John'),
('Smith', 'John'),('Smith', 'Robert'),('Jones', 'David'),('Smith', 'John'),
('Smith', 'John'),('Smith', 'Robert'),('Jones', 'David'),('Smith', 'John')
查询
SELECT LastName, FirstName,
UPPER(LEFT(LastName, 3)) + LEFT('000', LEN(ROW_NUMBER()
OVER (PARTITION BY LEFT(LastName, 3)ORDER BY LEFT(LastName, 3)) )+1)
+ CAST(ROW_NUMBER() OVER (PARTITION BY
LEFT(LastName, 3)ORDER BY LEFT(LastName, 3)) AS NVARCHAR(1000)) AS ID
FROM @Table
结果集
╔══════════╦═══════════╦══════════╗
║ LastName ║ FirstName ║ ID ║
╠══════════╬═══════════╬══════════╣
║ Jones ║ David ║ JON001 ║
║ Jones ║ David ║ JON002 ║
║ Jones ║ David ║ JON003 ║
║ Jones ║ David ║ JON004 ║
║ Smith ║ John ║ SMI001 ║
║ Smith ║ John ║ SMI002 ║
║ Smith ║ Robert ║ SMI003 ║
║ Smith ║ John ║ SMI004 ║
║ Smith ║ John ║ SMI005 ║
║ Smith ║ Robert ║ SMI006 ║
║ Smith ║ John ║ SMI007 ║
║ Smith ║ John ║ SMI008 ║
║ Smith ║ Robert ║ SMI009 ║
║ Smith ║ John ║ SMI00010 ║
║ Smith ║ John ║ SMI00011 ║
║ Smith ║ Robert ║ SMI00012 ║
╚══════════╩═══════════╩══════════╝
下面是一个查询,演示如何生成此类ID:
SELECT FirstName,
LastName,
Code = UPPER(LEFT(LastName, 3))
+ RIGHT('000'
+ CAST(
Row_Number() OVER ( PARTITION BY LastName
ORDER BY FirstName)
AS NVARCHAR(3))
, 3)
FROM [Table1]