Question

我有两个表emp1和emp2，我想从表中获取备用记录，如奇数和偶数以及Emp的第三个Max Salary

表格如emp1

empno empname empposition
1     abc     Manager
2     cef     Clark
3     xyz     Supervisor
4     pqr     Peon
5     hij     Senior Manager

像emp2一样的表

empno empname empsalary
1     abc     25,000
2     cef     15,000
3     xyz     10,000
4     pqr     5,000
5     hij     35,000

Answer 1

在SQL表中获取奇数行和偶数行的最佳方法是使用RowNumber完成，

Declare @Emp2 Table (empno INT, empname VARCHAR(10), empsalary INT)


INSERT INTO @Emp2 (empno,empname,empsalary) VALUES (1    , 'abc'  ,   25000)
INSERT INTO @Emp2 (empno,empname,empsalary) VALUES (2    , 'cef'  ,   15000)
INSERT INTO @Emp2 (empno,empname,empsalary) VALUES (3    , 'xyz'  ,   10000)
INSERT INTO @Emp2 (empno,empname,empsalary) VALUES (4    , 'pqr'  ,   5000 )
INSERT INTO @Emp2 (empno,empname,empsalary) VALUES (5    , 'hij'  ,   35000)

SELECT *
FROM (
    SELECT *, Row_Number() OVER(ORDER BY empno) AS RowNumber 
            --Row_Number() starts with 1
    FROM @Emp2
) t
WHERE t.RowNumber % 2 = 0 --Even
--WHERE t.RowNumber % 2 = 1 --Odd

Answer 2

使用偶数员工的Bellow Query

select empname as Employee,salary as Salary 
 from emp2 
 where empno in (
                 select empno 
                 from emp2 
                 group by empno having empno%2=0
                )

同时使用Bellow Query for Odd Number Employee

select empname as Employee,salary as Salary 
 from emp2 
 where empno in (
                 select empno 
                 from emp2 
                 group by empno having empno%2 <> 0
                )

Answer 3

您可以尝试以下方式，它对我有用。

获取连续编号的行：

SELECT * FROM table_name WHERE column_name％2 = 0

获取奇数编号的行：

SELECT * FROM table_name WHERE column_name％2 = 1

希望它有所帮助!!

Answer 4

试试这个：

FOR ODD RECORDS

 SELECT * FROM EMP1 INNER JOIN EMP2 ON EMP1.EMPNO=EMP2.EMPNO WHERE (EMP1.empno %2)<> 0

即使是有记录的

 SELECT * FROM EMP1 INNER JOIN EMP2 ON EMP1.EMPNO=EMP2.EMPNO WHERE (EMP1.empno %2)= 0

FOR THIRD MAX SALARY

SELECT TOP 1 EMPSALARY FROM EMP2 WHERE EMPSALARY NOT IN
(SELECT TOP 2 EMPSALARY FROM EMP2 ORDER BY EMPSALARY DESC)
ORDER BY EMPSALARY DESC

Answer 5

我试试这个，它对我有用，我希望它能帮助你。

（偶数）

select * from emp1 where rowid in (select decode(mod(rownum,2),0,rowid, null) from emp1);

（ODD NUMBERED）

select * from emp1 where rowid in (select decode(mod(rownum,2),0,null ,rowid) from emp1);

第三名MAX薪水

select distinct empsalary from emp2 e1 where 3 = (select count(distinct empsalary ) from emp2 e2 where e1.empsalary <= e2.empsalary );

Answer 6

要从表中获取备用记录，可以运行以下查询：

select r,empno,empname,empposition from(select rownum r,empno,empname,empposition from emp1) where mod(r,2)=1;

Answer 7

下面是在SQL SERVER中感染奇数记录的记录
这是salarytable2：

name    salary
abc 100000
bc  1000000
efg 50000
klm 2000000

在这里，我使用Row_number()获取行号，并对其应用模数以将其分类为偶数或奇数记录。

select * from (select *,ROW_NUMBER() over(order by salary) as rownum from salarytable2) as saltable where saltable.rownum%2 <>0;

Answer 8

WITH CTE_GET_ALTERNATE_RECORDS
AS
    (
        SELECT *, ROW_NUMBER()OVER(ORDER BY BOOK_ID) AS [ROW_NUMBER] FROM BOOK 
    )
    SELECT * FROM CTE_GET_ALTERNATE_RECORDS WHERE [ROW_NUMBER]%2=1
--WHERE [ROW_NUMBER]%2=0 For even rows

Answer 9

获取奇数记录：

select columnname from (select rowno,columnname from table) where mod(rowno,2)=1;

获取偶数记录：

select columnname from (select rowno/columnname from table) where mod(rowno,2)=0;

从表中获取ALTERNATE记录。

9 个答案: