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 |