1. 程式人生 > >mysql SQL

mysql SQL

change region uniq sch tab move iso null column

---恢復內容開始---

顯示所有字段名

select COLUMN_NAME,COLUMN_COMMENT from information_schema.COLUMNS where table_name = ‘your_table_name‘;


刪除字段:

alter table `good_basic` drop column `isOTC` ;

  1. ALTER TABLE `user_movement_log` CHANGE `GatewayId` `GatewayId` int not null default 0 AFTER RegionID
  2. //主鍵
  3. alter table tabelname add new_field_id int(5) unsigned default 0 not null auto_increment ,add primary key (new_field_id);//增加一個新列
  4. alter table t2 add d timestamp;
  5. alter table infos add ex tinyint not null default ‘0‘;//刪除列
  6. alter table t2 drop column c;//重命名列
  7. alter table t1 change a b integer;
  8. //改變列的類型
  9. alter table t1 change b b bigint not null;
  10. alter table infos change list list tinyint not null default ‘0‘;
  11. //重命名表
  12. alter table t1 rename t2;加索引
  13. mysql> alter table tablename change depno depno int(5) not null;
  14. mysql> alter table tablename add index 索引名 (字段名1[,字段名2 …]);
  15. mysql> alter table tablename add index emp_name (name);加主關鍵字的索引
  16. mysql> alter table tablename add primary key(id);加唯一限制條件的索引
  17. mysql> alter table tablename add unique emp_name2(cardnumber);刪除某個索引
  18. mysql>alter table tablename drop index emp_name;修改表:

---恢復內容結束---

mysql SQL