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oracle可重復執行腳本(添加字段)

imm alter 字段 varchar rac nbsp ger 可重復 oracle

--添加債券期限字段

declare

  cn integer;

begin

  cn := 0;

  select count(*)

  into cn

  from user_tab_cols t

  where t.table_name=‘T_BANK_BOND_MARKET_SET

  and t.column_name =‘B_LEVEL_ISSUE‘;

  if cn =0 then

  execute immediate ALTER TABLE T_BANK_BOND_MARKET_SET ADD (B_LEVEL_ISSUE VARCHAR2(10))‘;

  end if

;

end;

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oracle可重復執行腳本(添加字段)