oracle表中增加字段sql

declare v_Count1 int := 0;
v_Count2 int := 0;
begin
select count(1) into v_Count1 from user_all_tables where Upper(Table_Name) = Upper(\'LSZGZD\');
if(v_Count1 > 0 ) then
select count(1) into v_Count2 from user_tab_cols where Upper(Table_name) = Upper(\'LSZGZD\') and Upper(Column_Name) = Upper(\'LSZGZD_CODE\');
if(v_Count2 <= 0 ) then
execute immediate(\'alter table LSZGZD add LSZGZD_CODE varchar2(36) \');
end if;
end if;
end;
go
declare v_Count1 int := 0;
v_Count2 int := 0;
begin
select count(1) into v_Count1 from user_all_tables where Upper(Table_Name) = Upper(\'LSZGZD\');
if(v_Count1 > 0 ) then
select count(1) into v_Count2 from user_tab_cols where Upper(Table_name) = Upper(\'LSZGZD\') and Upper(Column_Name) = Upper(\'LSZGZD_TYPE\');
if(v_Count2 <= 0 ) then
execute immediate(\'alter table LSZGZD add LSZGZD_TYPE varchar2(240) \');
end if;
end if;
end;
go