MySQL的基本用法

1。建表

CREATE TABLE tbl_order_confirm(
orderid CHAR(16) NOT NULL,
dealid VARCHAR(64) NOT NULL,
bankdealid VARCHAR(20),
orderamount FLOAT(6, 2) NOT NULL,
payamount FLOAT(6, 2) NOT NULL,
cardnumber VARCHAR(18),
cardpwd VARCHAR(18),
ordertime TIMESTAMP NOT NULL,
confirmdate TIMESTAMP NOT NULL,
status CHAR(1) NOT NULL,
failurereason VARCHAR(100),
PRIMARY KEY (orderid)
)ENGINE=INNODB
COMMENT='订单确认表'
;

2。查询数据：
SELECT * FROM tbl_coin WHERE uno in (select uno from tbl_user where userid='hairongn')

SELECT * FROM tbl_coin WHERE mno =3
select uno from tbl_user where userid='hairongn'(查询uno从表格tbl-user 里面根据userid)

3。插入数据
insert into test(uno,mno,balance,status,createdate) values (222278892,300,500,'A','2012-06-01 15:22:33');

4删除数据：
delete from test where status='A'; （删除表test里面所有状态为A的记录）

5。更新数据

UPDATE table_name SET width = 100  where  id=5    （更改width为100，在id=5的这条记录里面）