将 T-SQL 存储过程查询转换为 MySQL

Question

我正在将查询从 MS SQL 服务器转换为 MySQL

我的 SQL 服务器查询如下。

SELECT      userId,IndustriesID,value AS ProvIndusID
FROM        #Talent_list
CROSS APPLY STRING_SPLIT(IndustriesID,',')

我被困在这里将字符串转换为行并交叉应用。

Answer 1

MySQL 没有 return 表的函数。您可以用递归 CTE 替换逻辑：

with recursive cte as (
      select state, cast(null as char(100)) as city, cities, 0 as lev
      from talent_list
      union all
      select state, substring_index(cities, ',', 1),
             substr(cities, length(substring_index(cities, ',', 1)) + 2), lev + 1
      from cte
      where cities <> '' and lev < 5
     )    
select state, city
from cte
where lev > 0;

Here 是一个 db<>fiddle.

将 T-SQL 存储过程查询转换为 MySQL

Convert T-SQL stored procedure query to MySQL

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database-migration