SQL - 根据计数器值插入 table

Question

我有 tabA:

________________________
|ID  |EMPLOYEE|CODE    |
|49  |name1   |mobile  |
|393 |name2   |none    | 
|3002|name3   |intranet|
________________________

ID 列 (tabA) 基于以下 tabB 中的计数器：

_________________
|TYPE       |ID  |
|intranet   |3003|
|mobile     |50  | 
|none       |394 |
__________________

我想使用 ID 计数器（因为它是下一个可用 ID）在 tabA 中插入新行。如何根据计数器值插入 table？

我正在尝试这种方法，结果是尝试插入重复类型，而不是 max(ID):

 INSERT INTO tabA (ID, EMPLOYEE, CODE)  

VALUES ((select max(ID) from tabB where TYPE = 'A'),name4,'intranet');

我希望看到 tabA:

________________________
|ID  |EMPLOYEE|CODE    |
|3000|name1   |mobile  |
|3001|name2   |none    | 
|3002|name3   |intranet|
|3003|name4   |intranet|
________________________

tabB:

_________________
|TYPE       |ID  |
|mobile     |2999|
|none       |3002| 
|intranet   |3004|
__________________

Answer 1

使用insert . . . select:

INSERT INTO tabA(ID, EMPLOYEE, CODE)  
    select max(ID), 'name4', 'intranet'
    from tabB
    where TYPE = 'A';

Answer 2

这将解决您的问题：（假设您的 ID 是递增的）

INSERT INTO tabA (ID, EMPLOYEE, CODE)

 VALUES ((SELECT TOP 1 ID + 1 FROM tabA ORDER BY ID DESC),'name4', 'intranet')

Answer 3

我会建议以下答案：

我假设的@tabA 和@tabB 就是你上面的tabA 和tabB。

declare @tabA table
(
    id integer,
    employee nvarchar(10),
    code nvarchar(10)
)

insert into @tabA values (49, 'name1','mobile');
insert into @tabA values (393, 'name2','none');
insert into @tabA values (3002, 'name3','intranet');

declare @tabB table
(
    type_ nvarchar(10),
    ID integer
)

insert into @tabB values ('intranet',3003);
insert into @tabB values ('mobile',50);
insert into @tabB values ('none', 394);

insert into @tabA
select MAX(b.ID), 'name4','intranet'
from @tabB B
where b.type_ = 'intranet'

declare @max integer

select @max = MAX(ID) from @tabB where type_ = 'intranet'

declare @max_1 integer
set @max_1 = @max + 1

update @tabB
set ID = @max_1
from @tabB B
where type_ = 'intranet'

select * from @tabA

select * from @tabB

----------------------------
what I got from @tabA

49      |name1| mobile
393     |name2| none
3002    |name3| intranet
3003    |name4| intranet

what I got from @tabB

intranet|3004
mobile  |50
none    |394