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to_date('2005-01-01 13:14:20','yyyy-MM-dd HH24:mm:ss') ;
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create table courses(
cid varchar(20) not null primary key,
cname varchar(20) not null,
ctype integer,
ctime date DEFAULT SYSDATE,
cscore float not null
)
insert into courses values('ss01','.NET',0,TO_DATE('2009-8-28','yyyy-mm-dd'),94)
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RETURN TYPE_BIND AS
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