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sElECt Count(t.*) As u From tABlE tΪʲôCount(...

1)count÷ûcount(t.*),ֻcountt.idcount*IDDZеֶ 2U,ڱͼִʱűǰsqlвֱӦ

ʾcount(*)һֵȻñvŽȥݿ̨ʾ ___________ v | ----------- 102 | ----------- ĻӦóеõʱ FIELDBYNAME

select case when status=0 then 'Ѵ' when status=1 then '' when status=12 then '' end,count(*) from task group by status statusstatu

򵥵ֱӰ as c õһѯ select t.a,t.b,t.c,(select s.c from table1 s where t.id=s.tid) from (select t.a,t.b,sum(t.sal) as c,max(t.id) as id from table t group by a,b) t

Ӳѯselect count(1) as num from A where A.ID = B.ID ͳBAIDӵ Ӳѯ=0ͿʵִBųA

-- ȷģWITH CTE AS(SELECT ROW_NUMBER() OVER(ORDER BY id desc) AS rowno,t.* FROM table AS t )SELECT * FROM CTE WHERE rowno BETWEEN 1 AND 20

SQL1: select decode(t.num_rows, 0, t.table_name, null) ݵı, decode(t.num_rows, 0, null, t.table_name) ݵı from user_tables t where t.table_name in (SELECT t1.table_name FROM All_All_Tables t1); SQL2 select decode(...

ݱ~Dzǰûд°װ ~Ŀռ֧ô

һselect count(*) from T; ãѯTм¼ select * from T; ãѯTеļ¼ һѯΪһֵDZм¼ѯDZݣǰֶֶ֣ݵ...

'a1224125108.phome_enewsloginfail' ˵ õ۹ݿ޸һ,оͲο˵,ݿṹһ

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