sql - 在Sql Server中选择一行作为第一行而不使用order by

Question

例子：

id  name  agreement
32  fahid   52
43  nahid   51
31  zal     52

想通过协议选择，但我想保留给定的顶部id，如果我使用，order by那么总是对 id 进行排序。如果我搜索agreement=52然后id=32预期结果：

32 fahid 52
31 fahid 52

Answer 1

尝试这个

DECLARE @id INT
DECLARE @agreement INT

SET @id = 32
SET @agreement = 52

SELECT [id]
, (SELECT [name] FROM Table1 WHERE [id] = @id) AS [name]
, [agreement] FROM Table1 
WHERE [agreement] = @agreement

SQL 小提琴演示

输出

id  name    agreement
32  fahid   52
31  fahid   52

Answer 2

您可以按顺序使用多个字段 order by id,agreement

Answer 3

在 mysql 中使用 LIMIT

MySQL 语法

SELECT column_name(s)FROM table_name WHERE (condition) LIMIT number;

例子

SELECT * FROM Persons WHERE agreement=52 LIMIT 5;

甲骨文语法

SELECT column_name(s)FROM table_name WHERE ROWNUM <= number; 

例子

SELECT * FROM Persons WHERE ROWNUM <=5;