根据日期得到星期的函数代码,MSSQL代码库,德仔网

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【MSSQL】根据日期得到星期的函数
作者:Dezai.CN / 发布于2012/2/8/ 542
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<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">--</span><span style="color: green; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">最直接的方式就是用</span><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">case when</span><span style="color: green; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">判断，这里用表变量来处理的</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">go</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">--</span><span style="color: green; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">创建函数</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: blue; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">create</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">function</span> [dbo]<span style="color: gray;">.</span>[m_getweek]<span style="color: gray;">(</span>@date <span style="color: blue;">nvarchar</span><span style="color: gray;">(</span>2000<span style="color: gray;">))</span><span style="mso-spacerun: yes;">   </span></span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: blue; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">returns</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">varchar</span><span style="color: gray;">(</span>2000<span style="color: gray;">)</span></span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: blue; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">AS</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: blue; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">begin</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> </span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"><span style="mso-tab-count: 1;">    </span><span style="color: blue;">declare</span> @weekday <span style="color: blue;">nvarchar</span><span style="color: gray;">(</span>300<span style="color: gray;">)</span></span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"><span style="mso-tab-count: 1;">    </span><span style="color: blue;">declare</span> @table <span style="color: blue;">table</span> <span style="color: gray;">(</span>id <span style="color: blue;">int</span> <span style="color: gray;">,</span>weekday <span style="color: blue;">nvarchar</span><span style="color: gray;">(</span>200<span style="color: gray;">))</span></span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"><span style="mso-tab-count: 1;">    </span><span style="color: blue;">insert</span> <span style="color: blue;">into</span> @table</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"><span style="mso-tab-count: 1;">    </span><span style="color: blue;">select</span> 0<span style="color: gray;">,</span><span style="color: red;">'</span></span><span style="color: red; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期天</span><span lang="EN-US" style="color: red; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">'</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">union</span> <span style="color: blue;">select</span> 1<span style="color: gray;">,</span><span style="color: red;">'</span></span><span style="color: red; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期一</span><span lang="EN-US" style="color: red; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">'</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">union</span> <span style="color: blue;">select</span> 2<span style="color: gray;">,</span><span style="color: red;">'</span></span><span style="color: red; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期二</span><span lang="EN-US" style="color: red; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">'</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">union</span> </span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"><span style="mso-tab-count: 1;">    </span><span style="color: blue;">select</span> 3<span style="color: gray;">,</span><span style="color: red;">'</span></span><span style="color: red; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期三</span><span lang="EN-US" style="color: red; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">'</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">union</span> <span style="color: blue;">select</span> 4<span style="color: gray;">,</span><span style="color: red;">'</span></span><span style="color: red; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期四</span><span lang="EN-US" style="color: red; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">'</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">union</span> <span style="color: blue;">select</span> 5<span style="color: gray;">,</span><span style="color: red;">'</span></span><span style="color: red; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期五</span><span lang="EN-US" style="color: red; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">'</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> <span style="color: blue;">union</span> <span style="color: blue;">select</span> 6<span style="color: gray;">,</span><span style="color: red;">'</span></span><span style="color: red; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期六</span><span lang="EN-US" style="color: red; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">'</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"><span style="mso-tab-count: 1;">    </span><span style="color: blue;">select</span> @weekday<span style="color: gray;">=</span>weekday <span style="color: blue;">from</span> @table <span style="color: blue;">where</span> id<span style="color: gray;">=(</span><span style="color: fuchsia;">datepart</span><span style="color: gray;">(</span>dw<span style="color: gray;">,</span>@date<span style="color: gray;">)-</span>1<span style="color: gray;">)</span></span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"><span style="mso-tab-count: 1;">    </span><span style="color: blue;">return</span> @weekday</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: blue; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">end</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: blue; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> </span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">--</span><span style="color: green; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">测试示例</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: blue; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">select</span><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> [dbo]<span style="color: gray;">.</span>[m_getweek]<span style="color: gray;">(</span><span style="color: fuchsia;">getdate</span><span style="color: gray;">())</span> <span style="color: blue;">as</span> </span><span style="font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;"> </span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">--</span><span style="color: green; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">今天的星期</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">/*</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span style="color: green; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">--------</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span style="color: green; font-family: 宋体; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New"; mso-bidi-font-family: "Courier New";">星期六</span>
<p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; mso-layout-grid-align: none;"><span lang="EN-US" style="color: green; font-family: "Courier New"; font-size: 10pt; mso-font-kerning: 0pt; mso-no-proof: yes;">*/</span>
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