- STUFF 函数用于删除或者替换指定长度的字符串
-- STUFF 返回字符串类型
STUFF(字段名,开始位置,长度,替代字符串);
SELECT STUFF('aabbcc',3,2,'');
SELECT STUFF('aabbcc',3,2,'eeee');
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SELECT * FROM Subject WHERE ID=4;
SELECT *,STUFF(Description,7,5,'') AS New_Description FROM Subject WHERE ID=4;
SELECT *,STUFF(Description,7,5,'替代字符abcd') AS New_Description FROM Subject WHERE ID=4;
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