Jam*_*mes 8 sql-server-2008-r2
我有一堆财务报告，我们希望能够将两个输入（年和季度）作为变量传递给它们。
我是这样做的，但我真的不喜欢它：
declare @quarter int,
@year int,
@date date
set @quarter = 4
set @year = 2018
set @date = cast(@year as varchar(4)) + '-01-01'
set @date = dateadd(quarter, @quarter - 1, @date)
print @date
问题从整数输入重建日期的最佳方法是什么？
想要的结果：
2018-10-01
Dav*_*oft 12
怎么样
declare @quarter int = 4
declare @year int = 2018
select datefromparts(@year,(@quarter-1)*3+1,1)
或者如果您仍在使用 SQL 2008：
select dateadd(month,(@quarter-1)*3,dateadd(year, @year-2018,'20180101'))
McN*_*ets 10
让我建议不要使用像“-”或“/”这样的日期分隔符，它取决于区域设置，使用YYYYMMDD格式。
declare @quarter int,
@year int,
@date date
set @quarter = 4
set @year = 2018
set @date = cast(@year as varchar(4)) + '0101'
set @date = dateadd(quarter, 1 - 1, @date)
print @date
set @date = cast(@year as varchar(4)) + '0101'
set @date = dateadd(quarter, 2 - 1, @date)
print @date
set @date = cast(@year as varchar(4)) + '0101'
set @date = dateadd(quarter, 3 - 1, @date)
print @date
set @date = cast(@year as varchar(4)) + '0101'
set @date = dateadd(quarter, 4 - 1, @date)
print @date
2018-01-01
2018-04-01
2018-07-01
2018-10-01
db<>在这里摆弄
您可以在 SQL Server 中创建日期维度或日历表并进行查询
--demo setup
drop table if exists #dim
DECLARE @StartDate DATE = '20000101', @NumberOfYears INT = 30;
-- prevent set or regional settings from interfering with
-- interpretation of dates / literals
SET DATEFIRST 7;
SET DATEFORMAT mdy;
SET LANGUAGE US_ENGLISH;
DECLARE @CutoffDate DATE = DATEADD(YEAR, @NumberOfYears, @StartDate);
-- this is just a holding table for intermediate calculations:
CREATE TABLE #dim
(
[date] DATE PRIMARY KEY,
[day] AS DATEPART(DAY, [date]),
[month] AS DATEPART(MONTH, [date]),
FirstOfMonth AS CONVERT(DATE, DATEADD(MONTH, DATEDIFF(MONTH, 0, [date]), 0)),
[MonthName] AS DATENAME(MONTH, [date]),
[week] AS DATEPART(WEEK, [date]),
[ISOweek] AS DATEPART(ISO_WEEK, [date]),
[DayOfWeek] AS DATEPART(WEEKDAY, [date]),
[quarter] AS DATEPART(QUARTER, [date]),
[year] AS DATEPART(YEAR, [date]),
FirstOfYear AS CONVERT(DATE, DATEADD(YEAR, DATEDIFF(YEAR, 0, [date]), 0)),
Style112 AS CONVERT(CHAR(8), [date], 112),
Style101 AS CONVERT(CHAR(10), [date], 101)
);
-- use the catalog views to generate as many rows as we need
INSERT #dim([date])
SELECT d
FROM
(
SELECT d = DATEADD(DAY, rn - 1, @StartDate)
FROM
(
SELECT TOP (DATEDIFF(DAY, @StartDate, @CutoffDate))
rn = ROW_NUMBER() OVER (ORDER BY s1.[object_id])
FROM sys.all_objects AS s1
CROSS JOIN sys.all_objects AS s2
-- on my system this would support > 5 million days
ORDER BY s1.[object_id]
) AS x
) AS y;
drop table if exists dbo.DateDimension
CREATE TABLE dbo.DateDimension
(
--DateKey INT NOT NULL PRIMARY KEY,
[Date] DATE NOT NULL,
[Day] TINYINT NOT NULL,
DaySuffix CHAR(2) NOT NULL,
[Weekday] TINYINT NOT NULL,
WeekDayName VARCHAR(10) NOT NULL,
IsWeekend BIT NOT NULL,
IsHoliday BIT NOT NULL,
HolidayText VARCHAR(64) SPARSE,
DOWInMonth TINYINT NOT NULL,
[DayOfYear] SMALLINT NOT NULL,
WeekOfMonth TINYINT NOT NULL,
WeekOfYear TINYINT NOT NULL,
ISOWeekOfYear TINYINT NOT NULL,
[Month] TINYINT NOT NULL,
[MonthName] VARCHAR(10) NOT NULL,
[Quarter] TINYINT NOT NULL,
QuarterName VARCHAR(6) NOT NULL,
[Year] INT NOT NULL,
MMYYYY CHAR(6) NOT NULL,
MonthYear CHAR(7) NOT NULL,
FirstDayOfMonth DATE NOT NULL,
LastDayOfMonth DATE NOT NULL,
FirstDayOfQuarter DATE NOT NULL,
LastDayOfQuarter DATE NOT NULL,
FirstDayOfYear DATE NOT NULL,
LastDayOfYear DATE NOT NULL,
FirstDayOfNextMonth DATE NOT NULL,
FirstDayOfNextYear DATE NOT NULL
);
INSERT dbo.DateDimension WITH (TABLOCKX)
SELECT
--DateKey = CONVERT(INT, Style112),
[Date] = [date],
[Day] = CONVERT(TINYINT, [day]),
DaySuffix = CONVERT(CHAR(2), CASE WHEN [day] / 10 = 1 THEN 'th' ELSE
CASE RIGHT([day], 1) WHEN '1' THEN 'st' WHEN '2' THEN 'nd'
WHEN '3' THEN 'rd' ELSE 'th' END END),
[Weekday] = CONVERT(TINYINT, [DayOfWeek]),
[WeekDayName] = CONVERT(VARCHAR(10), DATENAME(WEEKDAY, [date])),
[IsWeekend] = CONVERT(BIT, CASE WHEN [DayOfWeek] IN (1,7) THEN 1 ELSE 0 END),
[IsHoliday] = CONVERT(BIT, 0),
HolidayText = CONVERT(VARCHAR(64), NULL),
[DOWInMonth] = CONVERT(TINYINT, ROW_NUMBER() OVER
(PARTITION BY FirstOfMonth, [DayOfWeek] ORDER BY [date])),
[DayOfYear] = CONVERT(SMALLINT, DATEPART(DAYOFYEAR, [date])),
WeekOfMonth = CONVERT(TINYINT, DENSE_RANK() OVER
(PARTITION BY [year], [month] ORDER BY [week])),
WeekOfYear = CONVERT(TINYINT, [week]),
ISOWeekOfYear = CONVERT(TINYINT, ISOWeek),
[Month] = CONVERT(TINYINT, [month]),
[MonthName] = CONVERT(VARCHAR(10), [MonthName]),
[Quarter] = CONVERT(TINYINT, [quarter]),
QuarterName = CONVERT(VARCHAR(6), CASE [quarter] WHEN 1 THEN 'First'
WHEN 2 THEN 'Second' WHEN 3 THEN 'Third' WHEN 4 THEN 'Fourth' END),
[Year] = [year],
MMYYYY = CONVERT(CHAR(6), LEFT(Style101, 2) + LEFT(Style112, 4)),
MonthYear = CONVERT(CHAR(7), LEFT([MonthName], 3) + LEFT(Style112, 4)),
FirstDayOfMonth = FirstOfMonth,
LastDayOfMonth = MAX([date]) OVER (PARTITION BY [year], [month]),
FirstDayOfQuarter = MIN([date]) OVER (PARTITION BY [year], [quarter]),
LastDayOfQuarter = MAX([date]) OVER (PARTITION BY [year], [quarter]),
FirstDayOfYear = FirstOfYear,
LastDayOfYear = MAX([date]) OVER (PARTITION BY [year]),
FirstDayOfNextMonth = DATEADD(MONTH, 1, FirstOfMonth),
FirstDayOfNextYear = DATEADD(YEAR, 1, FirstOfYear)
FROM #dim
OPTION (MAXDOP 1);
--solution
SELECT min(Date)
FROM [Test].[dbo].[DateDimension]
where [year] = 2018 and [Quarter]=4
| Date |
|------------|
| 2018-10-01 |