declare
sqlnum number;
begin
SELECT count(*) into sqlnum FROM USER_TAB_COLUMNS
WHERE TABLE_NAME =upper('OPEN_SHOP_PRODUCT') and COLUMN_NAME='DESC_STATUS' and COLUMN_NAME='PIC_STATUS';
if(sqlnum = 0) then
execute immediate 'alter table OPEN_SHOP_PRODUCT add(DESC_STATUS NUMBER(4))';
execute immediate 'comment on column OPEN_SHOP_PRODUCT.DESC_STATUS is ''文描发布状态：已发布0 未发布1''';
execute immediate 'alter table OPEN_SHOP_PRODUCT add(PIC_STATUS NUMBER(4))';
execute immediate 'comment on column OPEN_SHOP_PRODUCT.PIC_STATUS is ''图片发布状态：已发布0 未发布1''';
end if ;
dbms_output.put_line('增加成功！');
end ;
Oracle 更改字段的完美写法
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转载自zhangjiaweixt.iteye.com/blog/1495013
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