ORACLE sql 写法
ORACLE 格式转换to_char
to_num
2.ORACLE 实现 SQL中的if exists方法
SQL :
if exists(select * from baseinfobak m where m.codeinfo='圣马丁岛' )
update baseinfobak set codevalue='asdf' where codeinfo='圣马丁岛';
else
insert into baseinfobak values('98989','avnc','tutut','圣马丁岛');
ORACLE :
declare cou number;
begin
select count(*) into cou from dual where exists(select * from baseinfobak m where m.codeinfo='圣马丁岛' );
if cou = 0 then
update baseinfobak set codevalue='asdf' where codeinfo='圣马丁岛';
else
insert into baseinfobak values('98989','avnc','tutut','圣马丁岛');
end if;
end;
3.MSSQLSERVER 中 select * into TA2 from TA1 语句在 ORACLE 中的写法
——
select * into table1 from table2
create table table1 as select * from table2
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