CREATE TABLE [PAC06].[AC06004A]( [chPart] [varchar](16) NOT NULL, [sdRefDate] [smalldatetime] NOT NULL, [nmQty] [numeric](20, 3) NOT NULL, [nmSupport] [numeric](20, 3) NOT NULL, [nmOutst] [numeric](20, 3) NOT NULL, [inItem] [bigint] IDENTITY(1,1) NOT NULL, [chFrom] [varchar](6) NOT NULL, CONSTRAINT [PK_AC06004A] PRIMARY KEY CLUSTERED ( [inItem] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO ALTER TABLE [PAC06].[AC06004A] ADD CONSTRAINT [DF_AC06004A_nmSupport] DEFAULT ((0)) FOR [nmSupport] GO ALTER TABLE [PAC06].[AC06004A] ADD CONSTRAINT [DF_AC06004A_nmOutst] DEFAULT ((0)) FOR [nmOutst] GO ALTER TABLE [PAC06].[AC06004A] ADD DEFAULT ('') FOR [chFrom] GO
时间: 2023-10-05 22:07:33 浏览: 38
这是一段 SQL 代码,用于创建一个名为 AC06004A 的表。表中包含了一些列,如 chPart、sdRefDate、nmQty 等等,每列都有自己的数据类型。其中,inItem 列是一个自增长的主键列。代码还定义了一些约束,如主键约束、默认约束等等。这段代码的作用是在数据库中创建一个名为 AC06004A 的表,用于存储某些数据。
相关问题
DECLARE @nmSupport NUMERIC(14,4),@nmOutst NUMERIC(14,4),@chPart VARCHAR(16) SELECT @chPart = 'XXX' SELECT @nmOutst = 0 SELECT @nmSupport = 0 UPDATE acdb.PAC06.AC06004A SET nmSupport = CASE WHEN chPart = @chPart THEN CASE WHEN nmQty > @nmOutst THEN @nmOutst ELSE nmQty END ELSE CASE WHEN nmQty > nmOutst THEN nmOutst ELSE nmQty END END, nmOutst = CASE WHEN chPart = @chPart then case when @nmOutst>=@nmSupport then @nmOutst-@nmSupport else 0 end else nmOutst-nmSupport END, @nmOutst = CASE WHEN chPart = @chPart then case when @nmOutst>=@nmSupport then @nmOutst-@nmSupport else 0 end else nmOutst-nmSupport END, @nmSupport = case when chPart = @chPart then case when nmQty > @nmOutst then @nmOutst else nmQty end ELSE CASE WHEN nmQty > nmOutst THEN nmOutst ELSE nmQty END end, @chPart = chPart改成用SQLSERVE遍历的方式
可以使用 WHILE 循环遍历实现相同的功能,以下是使用 WHILE 循环的代码示例:
```
DECLARE @nmSupport NUMERIC(14,4),@nmOutst NUMERIC(14,4),@chPart VARCHAR(16)
DECLARE @rowcount INT, @counter INT
SELECT @counter = 1
SELECT @rowcount = COUNT(*) FROM acdb.PAC06.AC06004A
WHILE @counter <= @rowcount
BEGIN
SELECT @chPart = chPart, @nmQty = nmQty, @nmOutst = nmOutst, @nmSupport = nmSupport
FROM (SELECT ROW_NUMBER() OVER (ORDER BY chPart) AS RowNum, chPart, nmQty, nmOutst, nmSupport FROM acdb.PAC06.AC06004A) AS RowConstrainedResult
WHERE RowNum = @counter
IF @chPart = 'XXX'
BEGIN
SET @nmSupport = CASE WHEN @nmQty > @nmOutst THEN @nmOutst ELSE @nmQty END
END
ELSE
BEGIN
SET @nmSupport = CASE WHEN @nmQty > @nmOutst THEN @nmOutst ELSE @nmQty END
END
UPDATE acdb.PAC06.AC06004A
SET nmSupport = @nmSupport,
nmOutst = CASE WHEN chPart = @chPart then case when @nmOutst>=@nmSupport then @nmOutst-@nmSupport else 0 end else nmOutst-@nmSupport END,
@nmOutst = CASE WHEN chPart = @chPart then case when @nmOutst>=@nmSupport then @nmOutst-@nmSupport else 0 end else nmOutst-@nmSupport END
WHERE chPart = @chPart
SET @counter = @counter + 1
END
```
请注意,使用 WHILE 循环遍历时,需要先获取表中的行数,如果行数很大,可能会对性能产生影响。
CREATE TABLE system_announcement (time DATETIME NOT NULL, publisher VARCHAR (50) NOT NULL, content BLOB NOT NULL );
这看起来像是一段 SQL 语句,它创建了一个名为 system_announcement 的表,该表包括三个列:时间(time)、发布者(publisher)和内容(content)。时间列类型为 DATETIME,不可为空;发布者列类型为 VARCHAR,长度为 50,也不可为空;内容列类型为 BLOB,也不可为空。这个表可能用于存储系统公告或其他类似的信息。
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