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ÏÔʾÊý¾Ý¿â»ò±í:
show databases;//È»ºó¿ÉÒÔuse database_name;
show tables;
¸ü¸Ä±íÃû:
alter table table_name rename new_t;
Ìí¼ÓÁÐ :
alter table table_name add column c_n column attributes;
ɾ³ýÁÐ:
alter table table_name drop column c_n;
´´½¨Ë÷Òý:
alter table c_table add index (c_n1,c_n2);
alter table c_table add unique index_name(c_n);
alter table c_table add primary key(sid);
ɾ³ýË÷Òý:
alter table c_table drop index c_n1;
¸ü¸ÄÁÐÐÅÏ¢:
alter table t_table change c_1 c_1 varchar(200);
alter table t_table modify 1 c_1 varchar(200);
insert²åÈëÓï¾ä:
insert into table_name (c_1,c_2)
values ('x1',1);
updateÓï¾ä:
update table_name set c_1 =1 where c_2=3;
ɾ³ýÊý¾Ý¿â»òÕß±í:
drop table table_name;
drop database database_name;//ʹÓÃmysql_drop_db()¿ÉÒÔɾ³ýµÄ.
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