oracle - Insert data into multiple table from one table using a procedure

Question

I have one parent table which consists of around 150 columns. I need to get the records from the parent table and insert them into 11 different child tables, which have the column names and data types.

Answer 1

Oracle 有一个非常方便的 INSERT ALL 命令可以在这种情况下提供帮助。无条件版本

的语法是：

INSERT ALL
  INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
  INTO child2 VALUES( col1, col2, col3 )
  INTO child3 ( col1, col2, col3 )
  INTO child4
SELECT col1, col2, col3
FROM parent
-- WHERE some conditions;

演示链接：--> http://sqlfiddle.com/#!4/3eb62/1 上面的命令使用（在底部）从表中

检索所有行，然后，对于每条检索到的记录，它执行所有陈述。 如果子句也有子句，则只会插入满足这些条件的行。 示例中的查询部分可以有多种形式：parentSELECT ... FROM ...INSERT ...
SELECTWHERE conditions

INSERT

• 具有明确定义的源表和目标表列的完整形式：

  INTO dest_table( destcol1, ... destcolN ) VALUES (sourcecol1, ..., sourcecolN)

• 仅给出源表中的列的缩短形式

  INTO dest_table VALUES (sourcecol1, ..., sourcecolN)

• 另一种缩短形式，其中仅给出目标表中的列

  INTO dest_table( destcol1, ... destcolN )

• 或最简单的：

  INTO dest_table

---

INSERT ALL还有一个条件版本：

INSERT ALL
  WHEN 1=1 THEN INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
  WHEN col1 <> 2 THEN INTO child2 VALUES( col1, col2, col3 )
  WHEN col3 < 3 THEN INTO child3 ( col1, col2, col3 )
  WHEN col2 = 'rec 3' THEN INTO child4
SELECT col1, col2, col3
FROM parent;

演示链接：---> http://sqlfiddle.com/#!4/e7da3/1 此版本仅在满足 after 子句

指定的条件时才插入行。对于每个选定的行，总是评估所有条件。WHEN

---

还有另一种条件形式：INSERT FIRST

INSERT FIRST
  WHEN col1 >= 4 THEN INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
  WHEN col1 >= 3 THEN INTO child2 VALUES( col1, col2, col3 )
  WHEN col1 >= 2 THEN INTO child3 ( col1, col2, col3 )
  WHEN col1 >= 1 THEN INTO child4
SELECT col1, col2, col3
FROM parent;

演示链接：http

://sqlfiddle.com/#!4/a421e/1 这里，对于每个源行，Oracle 从上到下评估条件，当某些条件为真时，只执行这一条INSERT语句，并跳过剩余的插入。

- - - - 编辑 - - - -

如何以程序方式执行此操作的示例：

CREATE OR REPLACE PROCEDURE name
AS
BEGIN
   INSERT ALL
      INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
      INTO child2 VALUES( col1, col2, col3 )
      INTO child3 ( col1, col2, col3 )
      INTO child4
   SELECT col1, col2, col3
   FROM parent ;
   -- if commit is required, place it here
   -- COMMIT;
END;
/