數(shù)據(jù)
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create?table?test(col1?varchar(1),
col2?varchar(1))
insert?into?test?values?('A','a')
insert?into?test?values?('A','d')
insert?into?test?values?('B','e')
insert?into?test?values?('A','j')
insert?into?test?values?('A','r')
insert?into?test?values?('B','g')
insert?into?test?values?('B','h')
insert?into?test?values?('B','t')
執(zhí)行
select?col1,?[col2]=stuff((select?','+[col2]?from?test?t?where?col1=test.col1?for?xml?path('')),?1,?1,?'')??from?test??group?by?col1
結(jié)果
相應(yīng)的表名和字段名你替換一下吧
sqlserver的查詢語句和插入更新語句怎么用
1、說明:復(fù)制表(只復(fù)制結(jié)構(gòu),源表名:a 新表名:b)
select * into b from a where 11(僅用于SQlServer)
2、說明:拷貝表(拷貝數(shù)據(jù),源表名:a 目標(biāo)表名:b)
insert into b(a, b, c) select d,e,f from a
use 你這個(gè)數(shù)據(jù)庫的名稱
go
select count(變量名)10
where 人員表。編號=訂單表。編號
and 訂單表。編號=物品表。編號
and 人名='張%'
go
我不知道你的變量名,這些你要自己改改
使用語句查詢SQL Server執(zhí)行過的語句及執(zhí)行效率
SELECT?TOP?1000
ST.text?AS?'執(zhí)行的SQL語句',
QS.execution_count?AS?'執(zhí)行次數(shù)',
QS.total_elapsed_time?AS?'耗時(shí)',
QS.total_logical_reads?AS?'邏輯讀取次數(shù)',
QS.total_logical_writes?AS?'邏輯寫入次數(shù)',
QS.total_physical_reads?AS?'物理讀取次數(shù)',
QS.creation_time?AS?'執(zhí)行時(shí)間'?,
QS.*
FROM???sys.dm_exec_query_stats?QS
CROSS?APPLY?
sys.dm_exec_sql_text(QS.sql_handle)?ST
--WHERE??QS.creation_time?BETWEEN?'2015-08-01?00:00:00'?AND?'2015-09-02?11:00:00'?
ORDER?BY
QS.creation_time?DESC
將兩條查詢語句作為子查詢的一部分連表.
select t1.count1+t2.count2 as 'countSum',t1.branch
(select count as count1, branch from table1 group by branch)t1
(select count as count2, branch from table2 group by branch)t2 on t1.branch =t2.branch
這種寫法有一個(gè)潛在的限制,t1中的branch 必須包含t2,所以你的需求一般這么寫:
select sum(counts)counts,branch
from(select * from(select count as counts, branch from table1 group by branch)t1
union
select * from(select count as counts, branch from table2 group by branch )t1)t
group by branch
方法一:可以通過執(zhí)行該命令來查看錯(cuò)誤日志信息:exec xp_readerrorlog 方法二:在SQL SERVER Management Studio中連接該sql server實(shí)例,object Explorer中查找Management-SQL Server logs-右鍵選view-》選擇你要看的日志信息(sql server log or sql server and Windows log)方法三:去安裝路徑下去找你的log文件,我的默認(rèn)實(shí)例路徑如下driver:\SQL Server 2008 R2\MSSQL10_50.MSSQLSERVER\MSSQL\Log\ERRORLOG