Question

所以这看起来应该很容易。但是说我有一个插页：

insert into TABLE VALUES ('OP','OP_DETAIL','OP_X')

我希望X从1-100开始。（知道有一些已经存在的数字，所以如果插入失败，我希望它继续下去）

我该怎么做？

Answer 1

这是一种稍快的方式

-- techniques from Jeff Moden and Itzik Ben-Gan:
;WITH E00(N) AS (SELECT 1 UNION ALL SELECT 1),
      E02(N) AS (SELECT 1 FROM E00 a, E00 b),
      E04(N) AS (SELECT 1 FROM E02 a, E02 b),
      E08(N) AS (SELECT 1 FROM E04 a, E04 b),
   cteTally(N) AS (SELECT ROW_NUMBER() OVER (ORDER BY N) FROM E08)
INSERT INTO yourTable
SELECT 'OP','OP_DETAIL','OP_' + CAST(N AS varchar)
FROM   cteTally
WHERE  N <= 100

Answer 2

无需循环。基于集合的方法FTW！

这是一个应该使用数字表的主要示例。其他的回答者在飞行中创造了相同的东西，但如果你问我，你就无法击败一张好的，老式的桌子！

使用您最好的Google-Fu查找脚本或here's one I made earlier

INSERT INTO your_table (you_should, always_list, your_columns)
SELECT 'OP'
     , 'OP_DETAIL'
     , 'OP_' + Cast(number As varchar(11))
FROM   dbo.numbers
WHERE  number BETWEEN 1 AND 100
AND    NOT EXISTS (
         SELECT your_columns
         FROM   your_table
         WHERE  your_columns = 'OP_' + Cast(numbers.number As varchar(11))
       )
;

Answer 3

CREATE TABLE #Temp (
    OPCol VARCHAR(128),
    OPDetailCol VARCHAR(128),
    OPXCol VARCHAR(128)
)

--Add sample data, representing some random OPX values that may already exist.
INSERT INTO #Temp (OPCol, OPDetailCol, OPXCol)
VALUES 
    ('OP','OP_DETAIL','OP_4'),
    ('OP','OP_DETAIL','OP_22'),
    ('OP','OP_DETAIL','OP_39'),
    ('OP','OP_DETAIL','OP_70')

--Common table expression with recursion.
;WITH CTE AS
(
    SELECT 1 AS OPCounter
    UNION ALL
    SELECT OPCounter + 1
    FROM CTE
    WHERE OPCounter < 100
)
INSERT INTO #Temp (OPCol, OPDetailCol, OPXCol)
SELECT 'OP','OP_DETAIL','OP_' + CAST(OPCounter AS VARCHAR(3))
FROM CTE
WHERE NOT EXISTS (
    SELECT 1
    FROM #Temp t
    WHERE t.[OPXCol] = 'OP_' + CAST(OPCounter AS VARCHAR(3))
)

--Verify results
SELECT * FROM #Temp

SQL SERVER插入添加？

3 个答案: