语句就是selectCoutdateCuser
amecaseis
ullDcash0whe
0the
selecttop1cashfromtable2wheretable2user
ameCuser
amea
ddatediffdCoutdatetable2outdate0orderbytable2cashelseDcashe
dascashfromselectfrom
fselecttop100dateadddco
verti
tuser
ame1mi
outdateasoutdatefromtable2groupbyuser
ameorderbyco
verti
tuser
ameasACROSSjoi
selectdisti
ctuser
amefromtable2asBasCleftjoi
selectoutdateuser
amemi
cashascashfromtable2groupbyoutdateuser
ameasDo
Cuser
ameDuser
amea
ddatediffdCoutdateDoutdate0
orderbyCoutdateco
verti
tCuser
ame
返回结果：outdate2001100100000000020011001000000000200201080000000001005012user
amecash90100

取出sql表中第31到40的记录（以自动增长ID为主键）
从数据表中取出第
条到第m条的记录
declaremi
tdeclare
i
tdeclaresqlvarchar800setm40
fset
31setsqlselecttopstrm
1fromidetailwhereautoid
oti
selecttopstr
1autoidfromidetailexecsql
selecttop10fromtwhereid
oti
selecttop30idfromtorderbyidordebyid

selecttop10fromtwhereidi
selecttop40idfromtorderbyidorderbyiddesc

一道面试题写sql语句
有表a存储二叉树的节点要用一条sql语句查出所有节点及节点所在的层表ac1c2A1ABBC2ACBDDNE3CEDFFKI4EIDKCN
所要得到的结果如下
jdcs
fA1B2C2D3N3E3F4K4I4有高手指导一下我只能用plsql写出来请教用一条sql语句的写法
SQLselectc2level1lv2fromteststart3withc1A4co
ectbyc1priorc25u
io
6selectA1fromdual7orderbylv
C2LVA1B2C2D3E3N3F4I4K4
已选择9行。
fr