总结-mysql

执行sql脚本：

　　source C:/users/liaolongjun/Desktop/miduo_fileinfo.sql;

　　注意，必须是正斜杆。如果是反斜杆，也会执行，但会报错。

导入数据：

　　LOAD DATA LOCAL INFILE "C:/users/liaolongjun/desktop/llj.txt" INTO TABLE llj;

　　路径要引起来。

添加unique：

　　ALTER TABLE dlph_friend_code ADD UNIQUE(coupon_code);

解决一闪而过：

　　找到my.ini文件，拷贝到与bin同级的目录下  (MySQL serverX.Y) Access denied for user 'root'@'localhost' (using password: YES)

　　修改密码，把密码改复杂点

　　set password for 'root'@'localhost'=password('a2010mifan');

mysql格式化日期 date_format -- >案例：SELECT DATE_FORMAT(NOW(), '%Y-%m-%d %T'), DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%s');

%a	Abbreviated weekday name (Sun..Sat)
%b	Abbreviated month name (Jan..Dec)
%c	Month, numeric (0..12)
%D	Day of the month with English suffix (0th, 1st, 2nd, 3rd, …)
%d	Day of the month, numeric (00..31)
%e	Day of the month, numeric (0..31)
%f	Microseconds (000000..999999)
%H	Hour (00..23)
%h	Hour (01..12)
%I	Hour (01..12)
%i	Minutes, numeric (00..59)
%j	Day of year (001..366)
%k	Hour (0..23)
%l	Hour (1..12)
%M	Month name (January..December)
%m	Month, numeric (00..12)
%p	AM or PM
%r	Time, 12-hour (hh:mm:ss followed by AM or PM)
%S	Seconds (00..59)
%s	Seconds (00..59)
%T	Time, 24-hour (hh:mm:ss)
%U	Week (00..53), where Sunday is the first day of the week
%u	Week (00..53), where Monday is the first day of the week
%V	Week (01..53), where Sunday is the first day of the week; used with %X
%v	Week (01..53), where Monday is the first day of the week; used with %x
%W	Weekday name (Sunday..Saturday)
%w	Day of the week (0=Sunday..6=Saturday)
%X	Year for the week where Sunday is the first day of the week, numeric, four digits; used with %V
%x	Year for the week, where Monday is the first day of the week, numeric, four digits; used with %v
%Y	Year, numeric, four digits
%y	Year, numeric (two digits)
%%	A literal “%” character
%x	x, for any “x” not listed above