select count() into :r_count from zw_kmyeb where km_code like '5%' and qcye0;messagebox('r_count',r_count)like 5%是什么?

select count和select count的区别 select count (1)V_COUNT := 0;SELECT COUNT(1) INTO V_COUNT FROM CUST WHERE CUST_ID = ARG_CUST_ID;IF V_COUNT = 0 THEN我是个初学者,今有如上这么一段程序,里面select count(1)是什么意思? select count(*)count 什么意思和select * 有什么区别 select count(*) from 怎么使用 select count(1) from emp and select 4718 fromselect count select count() into :r_count from zw_kmyeb where km_code like '5%' and qcye0;messagebox('r_count',r_count)like 5%是什么? select * into dept2 from dept group by 和 distinct 的问题select a.partner as pcode, count(distinct(a.deviceid)) as count -- into num4 from test a where a.activationtime >= to_date('2011-4-17', 'yyyy-mm-dd') and a.activationtime < to_date( select telnum,count(0),count(distinct othertelnum) from nmk.ljdx_cdr_temp group by telnum select Count(0) from MbrMember where 1=1Count(0)where 1=1 Oracle missing right parenthesis哪里缺少declare cunt number(8); create_table_str varchar(1000);create_sequence_str varchar(1000);begin select count(1) into cunt from user_tables where table_name='T_DBENTITY_MYSESSION'; if (cunt=0) then create_seq select * into b from a where 11 数据库中select into from 和 insert into select的区别 select count(*) from table1 select count(*) from table2 select count(*) from table3我从table1 table2 table3 中 找数据的条数怎样一下子用一条sql语句 算出TABLE1 TABLE2 TABLE3 记录的总和? 机器上的英文字母是什么意思啊u: unit select key t: lare key n: count select key select id from (select id from pedigree group by number having count(name)>1)as a; 为啥用as a 这个能合并成一句吗?select count(ITEMKIND) from ITEM where ITEMKIND='1' ; select count(ITEMKIND) from ITEM where ITEMKIND='2 ;select count(ITEMKIND) from ITEM where ITEMKIND='3' ;select count(ITEMKIND) from ITEM where ITEMKIND='4' ; select co