从CTE插入表

Question

我尝试将

master_data

表中的数据插入到

tpl_transferred_debtor

表中。由于

tpl_transferred_debtor

有主键

tpl_code

，我需要使用 CTE 来处理来自 插入之前

master_data

。

with distinct_object_code_id as (
    select MIN(id) as id
    from master_data
    where original_type = 'tpl'
    group by object_code
), 
tmp_tpl_table as (
    select 
        md.accounting_id as accounting_id, 
        md.object_code as object_code,
        md.name as name,
        md.created_at as created_at,
        md.updated_at as updated_at
    from master_data md
    join distinct_object_code_id using(id)
)
insert into tpl_transferred_debtor (debtor_id, tpl_code, status, description, created_at, updated_at)
select 
    tmp.accounting_id, 
    tmp.object_code, 
    'active', 
    tmp.name, 
    tmp.created_at, 
    tmp.updated_at
from tmp_tpl_table tmp;

它给出了这个错误

Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'insert into tpl_transferred_debtor (debtor_id, tpl_code, status, description, cr' at line 17

我通过删除

tmp_tpl_table

线检查了 CTE 表

insert into

，它工作正常。

with distinct_object_code_id as (
    select MIN(id) as id
    from master_data
    where original_type = 'tpl'
    group by object_code
), 
tmp_tpl_table as (
    select 
        md.accounting_id as accounting_id, 
        md.object_code as object_code,
        md.name as name,
        md.created_at as created_at,
        md.updated_at as updated_at
    from master_data md
    join distinct_object_code_id using(id)
)
select 
    tmp.accounting_id, 
    tmp.object_code, 
    'active', 
    tmp.name, 
    tmp.created_at, 
    tmp.updated_at
from tmp_tpl_table tmp;

如果我不使用CTE来处理数据，只写一个简单的

insert into ... select

，那么就可以了。

insert into tpl_transferred_debtor (debtor_id, tpl_code, status, description, created_at, updated_at)
select 
    tmp.accounting_id, 
    tmp.object_code, 
    'active', 
    tmp.name , 
    tmp.created_at, 
    tmp.updated_at
from master_data tmp
where tmp.original_type = 'tpl';

我在这里做错了什么？

编辑：MYSQL数据库版本是8.0.29-0ubuntu0.20.04.3。

Answer 1

尝试这个语法：

INSERT INTO tmp( tmp_id )
  WITH cte AS (
    SELECT 1 AS tmp_id FROM dual
  )
  SELECT tmp_id
  FROM cte;

https://dev.mysql.com/doc/refman/8.0/en/with.html

Answer 2

您似乎遇到了与 MySQL 中 CTE（公用表表达式）和后续 INSERT 语句的使用相关的语法问题。

在 MySQL 中，不能在 CTE 定义之后直接使用 INSERT 语句。为了克服这个问题，您需要将 INSERT 语句封装在另一个 SELECT 语句中。以下是修改查询的方法：

sql 复制代码 与distinct_object_code_id AS ( 选择 MIN(id) AS id 来自主数据 WHERE 原始类型 = 'tpl' 按对象代码分组 ), tmp_tpl_表 AS ( 选择 md.accounting_id AS 会计_id, md.object_code AS object_code, md.name AS 名称， md.created_at AS 创建的_at， md.updated_at AS update_at 来自master_data md 使用（id）连接distinct_object_code_id ） 插入 tpl_transferred_debtor（debtor_id、tpl_code、状态、描述、created_at、updated_at） 选择 tmp.accounting_id, tmp.object_code, '积极的'， tmp.名称， tmp.created_at， tmp.updated_at 从 tmp_tpl_table tmp; 在此修改后的查询中，我将 INSERT 语句包装在附加的 SELECT 语句中，这是 MySQL 中此语法限制的常见解决方法。

这应该可以解决您面临的语法错误。