排序规则导致like出错及纠正

USE tempdb
GO
IF OBJECT_ID('user1') IS NOT NULL DROP TABLE USER1
IF OBJECT_ID('user2') IS NOT NULL DROP TABLE user2
--user1
CREATE TABLE user1  (userName NVARCHAR(20))
INSERT INTO user1(userName) VALUES(N'王䜣')
INSERT INTO user1(userName) VALUES(N'小明')
--user2
CREATE TABLE user2 (userName NVARCHAR(20) collate chinese_prc_bin)
INSERT INTO user2(userName) VALUES(N'王䜣')
INSERT INTO user2(userName) VALUES(N'小明')

--字段没有加bin排序规则的表无法正常识别
SELECT * FROM user1 WHERE userName LIKE N'%䜣%'
/*
userName
王䜣
小明
*/
--字段没有加bin排序规则的表，手动在userName后加bin排序规则后可以识别
SELECT * FROM user1 WHERE userName collate chinese_prc_bin LIKE N'%䜣%'
/*
userName
王䜣
*/
--字段加bin排序规则的表可正常识别
SELECT * FROM user2 WHERE userName  LIKE N'%䜣%'
/*
userName
王䜣
*/
--将原表改排序规则后即可正常识别
ALTER TABLE user1 ALTER COLUMN userName NVARCHAR(20) collate chinese_prc_bin

SELECT * FROM user1 WHERE userName LIKE N'%䜣%'
/*
userName
王䜣
*/