Sql 选择符合条件的所有记录加上不符合条件的下一条记录
我有一个表,它有如下列:Sql 选择符合条件的所有记录加上不符合条件的下一条记录,sql,ms-access,Sql,Ms Access,我有一个表,它有如下列: ID, Description, PC, Account, Amount 我将在“PC”列中寻找一个009值,每个数据在“ID”列中都有一个顺序编号的唯一ID。具有009“PC”值的每个数据后面至少有一个项目没有将“009”作为PC值 我有没有办法写一个真实的、类似于下面伪代码的查询?这样的事情真的可能吗 SELECT table.ID AS ID, table.Description AS Description, table.PC AS PC WHER
ID, Description, PC, Account, Amount
我将在“PC”列中寻找一个009值,每个数据在“ID”列中都有一个顺序编号的唯一ID。具有009“PC”值的每个数据后面至少有一个项目没有将“009”作为PC值
我有没有办法写一个真实的、类似于下面伪代码的查询?这样的事情真的可能吗
SELECT
table.ID AS ID,
table.Description AS Description,
table.PC AS PC
WHERE ((table.PC = 009) OR (whatever, as long as table.ID-1's "PC" value = 009))
如果您知道
id
s实际上是顺序的,那么可以将逻辑放在WHERE
子句中:
SELECT t.ID, t.Description, t.PC AS PC
FROM table as t
WHERE t.PC = 009 OR
EXISTS (SELECT 1
FROM table as t2
WHERE t2.id = t.id - 1 AND t2.PC = 009
)
ORDER BY t.ID;
样本数据和预期输出将非常好,并且易于理解。问题的格式不正确,没有任何意义,因为它的表述如下:
选择所有符合条件的记录,再加上下一条不符合条件的记录
SELECT
table.ID AS ID,
table.Description AS Description,
table.PC AS PC
FROM table
WHERE ((table.PC = '009') OR
table.ID - 1 =
(
SELECT table.ID
FROM table
WHERE table.PC = '009'
)
)
SELECT
t.ID AS ID,
t.Description AS Description,
t.PC AS PC
FROM tbl t
WHERE
(t.PC = 009) OR
(t.id - 1 = (SELECT t2.ID FROM tbl t2 where t.PC = 009))