Oracle 中的 FORALL 语句

当要在 Oracle 中之心批量 INSERT、UPDATE 和 DELETE 操作时，可以使用 FORALL 语句。

语法：

Sql代码


--语法1：

FORALL 下标变量(只能当作下标被引用) IN 下限..上限

sql 语句; --只允许一条 sql 语句

--语法2：

FORALL 下标变量 IN INDICES OF(跳过没有赋值的元素，例如被 DELETE 的元素，NULL 也算值) 集合

[BETWEEN 下限 AND 上限]

sql 语句;

--语法3：

FORALL 下标变量 IN VALUES OF 集合(把该集合中的值当作下标，且该集合值的类型只能是 PLS_INTEGER BINARY_INTEGER)

sql 语句;

Sql代码


create table tb1(

id number(5),

name varchar2(50)

);

语法1演示：

Sql代码


--批量插入演示

declare

type tb_table_type is table of tb1%rowtype

index by binary_integer;

tb_table tb_table_type;

begin

for i in 1..10 loop

tb_table(i).id:=i;

tb_table(i).name:='NAME'||i;

end loop;

forall i in 1..tb_table.count

insert into tb1 values tb_table(i);

end;

--批量修改演示

declare

type tb_table_type is table of tb1%rowtype

index by binary_integer;

tb_table tb_table_type;

begin

for i in 1..10 loop

tb_table(i).id:=i;

tb_table(i).name:='NAMES'||i;

end loop;

forall i in 1..tb_table.count

update tb1 t set row = tb_table(i) where t.id = tb_table(i).id;

end;

--批量删除演示

declare

type tb_table_type is table of tb1%rowtype

index by binary_integer;

tb_table tb_table_type;

begin

for i in 1..10 loop

tb_table(i).id:=i;

tb_table(i).name:='NAMES'||i;

end loop;

forall i in 1..tb_table.count

delete tb1 where id = tb_table(i).id;

end;

语法2演示：

Sql代码


select * from tb1;

declare

type demo_table_type is table of demo%rowtype

index by binary_integer;

demo_table demo_table_type;

begin

for i in 1..10 loop

demo_table(i).id:=i;

demo_table(i).name:='NAME'||i;

end loop;

demo_table.delete(3);

demo_table.delete(6);

demo_table.delete(9);

forall i in indices of demo_table

insert into demo values demo_table(i);

end;

select * from demo;

1 1 NAME1

2 2 NAME2

3 4 NAME4

4 5 NAME5

5 7 NAME7

6 8 NAME8

7 10 NAME10

语法3演示：

Sql代码


declare

type index_poniter_type is table of pls_integer;

index_poniter index_poniter_type;

type demo_table_type is table of demo%rowtype

index by binary_integer;

demo_table demo_table_type;

begin

index_poniter:=index_poniter_type(1,3,5,7);

for i in 1..10 loop

demo_table(i).id:=i;

demo_table(i).name:='NAME'||i;

end loop;

forall i in values of index_poniter

insert into demo values demo_table(i);

end;

select * from demo;

1 1 NAME1

2 3 NAME3

3 5 NAME5

4 7 NAME7