sql - 获取sql server中每一行的MAX和MIN值

Question

我有一组带有值的行

我想要以下带有单独最大值和最小值的输出

对不起可怜的prntsceen。我不知道如何在stackoverflow中绘制表格。

Answer 1

select value1, value2, value3, value4,
       [min]=(select min(value) from (
              select value1 union all
              select value2 union all
              select value3 union all
              select value4) X(value)),
       [max]=(select max(value) from (
              select value1 union all
              select value2 union all
              select value3 union all
              select value4) Y(value))
  from tbl;

要将 NULL 识别为最小值，请改用以下内容

select value1, value2, value3, value4,
       [min]=(select TOP(1) value from (
                 select value1 union all
                 select value2 union all
                 select value3 union all
                 select value4) X(value)
              ORDER BY value ASC),
       [max]=(select TOP(1) value from (
                 select value1 union all
                 select value2 union all
                 select value3 union all
                 select value4) X(value)
              ORDER BY value DESC)
  from tbl;

Answer 2

试试这个——

DECLARE @temp TABLE
(
      Value1 INT
    , Value2 INT
    , Value3 INT
    , Value4 INT
)

INSERT INTO @temp (Value1, Value2, Value3, Value4)
VALUES 
    (NULL, 1, 1, NULL),
    (NULL, 1, 2, NULL),
    (NULL, 2, 2, NULL),
    (NULL, 2, 2, NULL),
    (1, 1, 1, 1),
    (2, 2, 1, 2),
    (1, 1, 1, NULL),
    (2, 2, 3, 2),
    (2, 2, 2, 2),
    (1, 1, 1, 1)

SELECT
      Value1
    , Value2
    , Value3
    , Value4
    , MinValue = (
        SELECT TOP 1 value 
        FROM (
            SELECT value = value1
              UNION
            SELECT value2
              UNION
            SELECT value3
              UNION
            SELECT value4
        ) mn
        ORDER BY value
    )
    , MaxValue = (
        SELECT MAX(value) 
        FROM (
            SELECT value = value1
              UNION
            SELECT value2
              UNION
            SELECT value3
              UNION
            SELECT value4
        ) mx
    )
FROM @temp

结果窗口：

Answer 3

请试试：

declare @T table
(
  id int, 
  num1 int, 
  num2 int, 
  num3 int,  
  num4 int,   
  num5 int
)

insert into @T values
(1,     6,      51,      NULL,      99,      34),
(2,     222,    251,     24,     299,     234),
(3,     NULL,   NULL,    NULL,   NULL,    NULL)

select * From @T

SELECT id,
(SELECT 
(CASE WHEN (num1+num2+num3+num4+num5) IS NULL THEN NULL 
    ELSE MIN(v) end) 
FROM (VALUES (num1), 
            (num2), 
            (num3), 
            (num4), 
            (num5)) AS value(v)) as [MinVal],
(SELECT MAX(v) 
FROM (VALUES (num1), 
            (num2), 
            (num3), 
            (num4), 
            (num5)) AS value(v)) as [MaxVal]
FROM @T