sql 根據指定字符截取前面幾個字符

1.找到指定字所在的位置並且減去多少是要截取的字符長度

CharIndex('元',product_name)-3)

2.截取

SUBSTRING(product_name, CharIndex('元',product_name)-3,3)

3.替換

REPLACE(SUBSTRING(product_name, CharIndex('元',product_name)-3,3),'- ','')

 

 

 

REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(SUBSTRING(old_package, CharIndex('元',old_package)-3,3),' ',''),'_',''),'戶',''),'包',''),'網包',''),'餐',''),'套餐',''),'-',''),'套',''),'網','')