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This article mainly introduces "the usage of CASE,GROUP BY sentences in mssql". In daily operation, I believe many people have doubts about the usage of CASE,GROUP BY sentences in mssql. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "the usage of CASE,GROUP BY sentences in mssql". Next, please follow the editor to study!

The copy code is as follows:

-- create database dbTemp use dbTemp create table test (Pid int identity (1union select 1) not null primary key, Years datetime, IsFirstSixMonths int default (0),-- 0 indicates the second half of the first half of the year-- TotalCome int) insert test select '2007-1-1) insert test select' 1100 select * from test select convert (char (4), Years,120) as' year' 0100 select * from test select convert (char (4), Years,120) as' year' IsFirstSixMonths=case when IsFirstSixMonths=0 then 'when IsFirstSixMonths=1 then' second half 'END, sum (totalcome) as' sum' from test group by IsFirstSixMonths,convert (char (4), Years,120) select convert (char (4), Years,120) as' year', IsFirstSixMonths=case when IsFirstSixMonths=0 then 'first half' ELSE 'second half' END, sum (totalcome) as' sum' from test group by IsFirstSixMonths,convert (char (4), Years,120)-DROP DATABASE dbtemp

The results are as follows:

2007 first half 110 2007 second half 80 2008 first half 2008 second half 2008

At this point, the study of "the use of CASE,GROUP BY sentences in mssql" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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