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SQL:在给定ID的where子句中查找下一行

SQL:在给定ID的where子句中查找下一行

您需要引用当前记录,然后根据已排序的列逐步查找下一条记录。下面的示例假定它已排序

ORDER BY Active, DIN, NAME

第一的:

SELECT *
FROM TABLE
WHERE NAME LIKE '%X%' AND DIN LIKE '%%'
ORDER BY Active, DIN, Name
LIMIT 1;

下一步:(请 )

SELECT *
FROM TABLE T
INNER JOIN TABLE CURR ON CURR.ID = 6 # the current ID being viewed
   AND ((T.Active = Curr.Active AND T.DIN = Curr.DIN AND T.NAME > Curr.Name)
     OR (T.Active = Curr.Active AND T.DIN > Curr.DIN)
     OR T.Active > Curr.Active)
WHERE T.NAME LIKE '%X%' AND T.DIN LIKE '%%'
ORDER BY T.Active, T.DIN, T.Name
LIMIT 1;

下面提供了一个工作样本

create table products
(ID int, SEED int, NAME varchar(20), DIN varchar(10), ACTIVE int, DELETED int);
insert products values
(1,  0,    'Product #1', '004812', 1,    0),
(2,  0,    'Product #2', '004942', 0,    0),
(3,  0,    'Product #3', '004966', 1,    0),
(4,  0,    'Product #4', '007437', 1,    1),
(5,  2,    'Product #2', '004944', 0,    0),
(6,  2,    'Product #2', '004944', 1,    0);

SELECT *
FROM products
WHERE active = 1 AND deleted = 0
ORDER BY din DESC, ID desc;

Output:
"ID";"SEED";"NAME";"DIN";"ACTIVE";"DELETED"
"3";"0";"Product #3";"004966";"1";"0"
"6";"2";"Product #2";"004944";"1";"0"
"1";"0";"Product #1";"004812";"1";"0"

如果当前是ID = 6的行,则可以使用检索下一条记录

SELECT T.*
FROM products T
INNER JOIN products curr on curr.ID = 6
   AND ((T.din = curr.din and T.ID > curr.ID)
    OR (T.din < curr.din))
WHERE T.active = 1 AND T.deleted = 0
ORDER BY T.din DESC, T.ID ASC
LIMIT 1;
SQLServer 2022/1/1 18:31:56 有468人围观

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