mysql alter Óï¾äÓ÷¨,Ìí¼Ó¡¢Ð޸ġ¢É¾³ý×Ö¶Î
//Ö÷¼ü
alter table tabelname add new_field_id int(5) unsigned default 0 not null auto_increment ,add primary key (new_field_id);
//Ôö¼ÓÒ»¸öÐÂÁÐ
alter table t2 add d timestamp;
alter table infos add ex tinyint not null default '0';
//ɾ³ýÁÐ
alter table t2 drop column c;
//ÖØÃüÃûÁÐ
alter table t1 change a b integer;
//¸Ä±äÁеÄÀàÐÍ
alter table t1 change b b bigint not null;
alter table infos change list list tinyint not null default '0';
//ÖØÃüÃû±í
alter table t1 rename t2;
¼ÓË÷Òý
mysql> alter table tablename change depno depno int(5) not null;
mysql> alter table tablename add index Ë÷ÒýÃû (×Ö¶ÎÃû1[£¬×Ö¶ÎÃû2 …]);
mysql> alter table tablename add index emp_name (name);
¼ÓÖ÷¹Ø¼ü×ÖµÄË÷Òý
mysql> alter table tablename add primary key(id);
¼ÓΨһÏÞÖÆÌõ¼þµÄË÷Òý
mysql> alter table tablename add unique emp_name2(cardnumber);
ɾ³ýij¸öË÷Òý
mysql>alter table tablename drop index emp_name;
ÐÞ¸Ä±í£º
Ôö¼Ó×ֶΣº
mysql> ALTER TABLE table_name ADD field_name field_type;
ÐÞ¸ÄÔ×Ö¶ÎÃû³Æ¼°ÀàÐÍ£º
mysql> ALTER TABLE table_name CHANGE old_field_name new_field_name field_type;
ɾ³ý×ֶΣº
mysql> ALTER TABLE table_name DROP field_name;
Ïà¹ØÎĵµ£º
Ò»¸ö¼òµ¥Ê¾Àý--
1£¬×¼±¸£ºMySQLÊý¾Ý¿âÇý¶¯°ü¡¾mysql-connector-java-5.1.10-bin.jar¡¿µ¼Èë
2£¬´´½¨²âÊÔÁ¬½ÓÖ÷³ÌÐò
package mysqlConnection;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
public class JdbcDemo {
public static void main(String[] args) {
......
<?php
/**
* ²Ù×÷mysql
µÄ»ù´¡À࣬ÆäËüÓëmysqlÓйصÄÀà¶¼¼Ì³ÐÓÚ´Ë»ùÀà
*
* ´ËclassÖеÄ$table¶¼ÊÇÒѾ°üº¬±íǰ׺µÄÍêÕû±íÃû
*
* ver 20090717
* ʹÓ÷¶Àý
* $db = new DB('localhost','root','password','database','utf8');
* $db->debug = true;
* $db->primaryKeys = array (
* 'table_1 ......
ÏîĿҪ½áÊøÁË...ÖÁÉÙ¿ª·¢Òª½áÊøÁË...
»ØÍ·¿´¿´×Ô¼º¾ÍÕâôһ¸öÈËÂñÍ·¿ª·¢ÁË4¸öÔ£¬ÒÔ¼°ÊÖÉÏÄõ½µÄÓë×Ô¼º¸¶³öÍêÈ«²»³ÉÕý±ÈµÄ΢±¡¹¤×Ê£¬¾õµÃ×Ô¼ºÕætmdµÄ±¯¾ç£¡
»òÐíÕâ¾ÍÊÇÓ¦½ì±ÏÒµÉúµÄÃü°É...¶÷£¬ÏÖÔÚÎÒÒѾ²»ÊÇÓ¦½ì±ÏÒµÉúÁË...
ÏÖÔÚÏîÄ¿×öÍêÁË£¬ÎÒÒ²¾¡µ½ÁËÉÆÊ¼ÉÆÖÕµÄÒåÎñÁË...
¿àË®¾Íµ¹µ½ÕâÀ»¹ÊǻعéÕýÌâ¡£
ÓÉÓ ......
ÕâÀïÊÇÒ»¸öʹÓÃÈÕÆÚº¯ÊýµÄÀý×Ó¡£ÏÂÃæµÄ²éѯѡÔñÁËËùÓмǼ£¬Æädate_colµÄÖµÊÇÔÚ×îºó30ÌìÒÔÄÚ£º
mysql> SELECT something from table
WHERE TO_DAYS(NOW()) - TO_DAYS(date_col) <= 30;
DAYOFWEEK(date)
·µ»ØÈÕÆÚdateµÄÐÇÆÚË÷Òý(1=ÐÇÆÚÌ죬2=ÐÇÆÚÒ», ……7=ÐÇÆÚÁù)¡£ÕâЩË÷ÒýÖµ¶ÔÓ¦ÓÚODBC±ê ......
mysql 5.0´æ´¢¹ý³Ìѧϰ×ܽá
Ò».´´½¨´æ´¢¹ý³Ì
1.»ù±¾Óï·¨£º
create procedure
sp_name()
begin
………
end
2.²ÎÊý´«µÝ
¶þ.µ÷Óô洢¹ý³Ì
1.»ù±¾Óï·¨£ºcall
sp_name()
×¢Ò⣺´æ´¢¹ý³ÌÃû³ÆºóÃæ±ØÐë¼ÓÀ¨ºÅ£¬ÄÄŸô洢¹ý³ÌûÓвÎÊý´«µÝ
Èý.ɾ³ý´æ´¢¹ý³Ì
1.»ù±¾Óï·¨£º
drop procedure ......