SQL查找替换字符作为字符串的一部分

使用Unicode函数：

DECLARE @TEST TABLE (ID INT, WORDS VARCHAR(10))

INSERT INTO @TEST VALUES (1, 'A�AA')
INSERT INTO @TEST VALUES (2, 'BBB')
INSERT INTO @TEST VALUES (3, 'CC�C')
INSERT INTO @TEST VALUES (4, 'DDD')

SELECT * FROM @TEST WHERE WORDS LIKE '%' + NCHAR(UNICODE('�')) + '%'

UPDATE @TEST
SET WORDS = REPLACE(WORDS, NCHAR(UNICODE('�')), 'X')

SELECT * FROM @TEST WHERE WORDS LIKE '%' + NCHAR(UNICODE('�')) + '%'
SELECT * FROM @TEST