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?

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selectcount()into:r_countfromzw_kmyebwherekm_codelike''5%''andqcye0;messagebox(''r_count'',r_count)like5

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() 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() into :r_count from zw_kmyeb where km_code like '5%' and qcye0;messagebox('r_count',r_count)like 5%是什么?
String ls_xm,ls_inkl,ls_ykl //定义变量ls_xm,ls_inkl,ls_ykl
String ls_bm,ls_lt,ls_js,ls_tj //定义变量ls_bm,ls_lt,ls_js,ls_tj
ls_xm=ddlb_user.Text //用户名 ,ls_xm读取ddlb_user中的值
ls_inkl=sle_pwd.Text //口令 ,ls_inkl读取sle_pwd中的值
IF ls_xm'' THEN ,
//取出原口令
SELECT m_password
INTO :ls_ykl
FROM member
WHERE m_name=:ls_xm; //如果ddlb_user中不为空,读取数据库中列m_name值等于ddlb_user中值的一行中列m_password 的值,并赋值给变量ls_ykl
IF ls_inklls_ykl THEN
IF ii_time=3 THEN
MessageBox('登录错误','对不起,你无权使用本系统!',Exclamation!)
HALT CLOSE
ELSE
ii_time++
END IF
MessageBox('口令错','请输入正确的口令',Exclamation!)
sle_pwd.SetFocus() //sle_pwd获得焦点
ELSE ////如果输入的密码与数据库中的不相符,弹出警告窗口MessageBox('口令错','请输入正确的口令',Exclamation!) ,三次后弹出警告窗口MessageBox('登录错误','对不起,你无权使用本系统!',Exclamation!) ,并关闭登录窗口
gs_xm=ls_xm
gs_password=ls_inkl
ib_exit=TRUE
CLOSE(Parent)
END IF
ELSE
MessageBox('用户名错','请选择您的用户名',Exclamation!)
ddlb_user.SetFocus()
END IF //数据库中没有所添的用户名,提示MessageBox('用户名错','请选择您的用户名',Exclamation!)
每一行程序的意思已在程序后表明,只不过是一个登录窗口的代码.根据数据库中的内容,判断用户名,密码是否正确!

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