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create table t_client (id number(4) primary key,
pid number(4) not null,
name varchar2(30) not null,
client_id varchar2(10),
client_level char(3),
bank_acct_no varchar2(30),
contact_tel  varchar2(30),
address    varchar2(30),
zip_code varchar2(10),
is_leaf char(1) default 'y' check (is_leaf in('y','n')),
is_client char(1) default 'n' check (is_client in('y','n')
));
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create sequence seq_t_client_id
minvalue 1
maxvalue 99999999
start with 1
increment by 1
nocache
order;
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CREATE OR REPLACE TRIGGER trg_t_client_id
BEFORE INSERT ON t_client
FOR EACH ROW
BEGIN
SELECT  seq_t_client_id.nextval INTO :new.id from dual;
END;
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insert into allentest values(allentest_id.nextval,'helloworld2')
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1.´«ÈëOracleDateTime.NULL
2.Nullable<DateTime> optime = DBNull.Value; ´«Èëoptime(¿ªÊ¼ÍøÉÏÕҵĴð°¸ÊÇNullable<DateTime> optime = null·¢ÏÖ»¹Êǻᱨ´í) ......

Oracle Êý¾Ý¿â¼àÌýÅäÖÃ

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µ¼ÈëOracleʵÀý

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create user iagent identified by ia
--profile default 
default  tablespace users
temporary tablespace temp;
--account unlock;
 
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drop user iagent cascade;
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  alter  user  iagent  identified   by ia;
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ORACLE ÐÐÁÐת»»Í¨Óô洢¹ý³Ì£¬ÒѾ­×ª»»µÄMSSQL°æ±¾

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Function Fun_Split_Str(p_Str Varchar2, p_Division Varchar2, p_Seq Int)
    Return Varchar2 Is
    v_First Int;
    v_Last  Int;
  Begin
    If p_Seq < 1 Then
   &nbs ......
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