（1）error 1045 28000
通過匿名用戶登錄MySQL服務器的。沒有創建數據庫的權限。
mysql -hlocalhost -u root –p。
（2）mysql 5.6.25 出現中文亂碼問題
舊版本中my.ini有詳細的設置，但是5.6.25中簡化了，而且參數名變了，具體設置爲
# For advice onhow to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOTEDIT THIS FILE. It's a template which will be copied to the
# *** defaultlocation during install, and will be replaced if you
# *** upgrade toa newer version of MySQL.
[mysqld]
character_set_server=utf8
character_set_client=utf8
# Remove leading# and set to the amount of RAM for the most important data
# cache inMySQL. Start at 70% of total RAM for dedicated server, else 10%.
#innodb_buffer_pool_size = 128M
# Remove leading# to turn on a very important data integrity option: logging
# changes to thebinary log between backups.
# log_bin
# These arecommonly set, remove the # and set as required.
#basedir=D:\mysql-5.6.25-winx64
#datadir=D:\mysql-5.6.25-winx64\bin\data
# port = .....
# server_id =.....
# Remove leading# to set options mainly useful for reporting servers.
# The serverdefaults are faster for transactions and fast SELECTs.
# Adjust sizesas needed, experiment to find the optimal values.
# join_buffer_size= 128M
#sort_buffer_size = 2M
#read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[client]
port=3306
default-character-set=utf8
除此之外，在建立數據庫時
Create databasestudents character set utf8;
以上兩步完成順利顯示中文。
（3）ERROR 1364 (HY000):Field 'ssl_cipher' doesn't have a default value解決方法
添加用戶 insert into mysql.user(Host,User,Password)values("localhost","test",password("1234"));
報以下的錯誤 ERROR 1364 (HY000): Field 'ssl_cipher' doesn't have a defaultvalue錯誤
正確的添加用戶方法：
GRANT USAGE ON *.* TO 'user01'@'localhost' IDENTIFIED BY'123456' WITH GRANT OPTION;
用戶：user01，密碼：123456，這樣就添加了一個新的用戶，不會出以上的錯誤了。
（4）mysql批處理中出現的問題
d:mysqlbin mysql < mytest.sql
出現沒有權限操作的時
用mysql –u root –p <mytest.sql ，輸入密碼進行驗證獲得權限後再進行操作。（5）存儲過程的函數
1 (1).字符串類
2 CHARSET(str)//返回字串字符集
3 CONCAT (string2 [,... ]) //連接字串
4 INSTR (string ,substring )//返回substring首次在string中出現的位置,不存在返回0
5 LCASE (string2 ) //轉換成小寫
6 LEFT (string2 ,length)//從string2中的左邊起取length個字符
7 LENGTH (string ) //string長度
8 LOAD_FILE (file_name )//從文件讀取內容
9 LOCATE (substring , string[,start_position ] ) 同INSTR,但可指定開始位置
10 LPAD (string2,length ,pad ) //重複用pad加在string開頭,直到字串長度爲length
11 LTRIM (string2 )//去除前端空格
12 REPEAT (string2 ,count )//重複count次
13 REPLACE (str ,search_str,replace_str )//在str中用replace_str替換search_str
14 RPAD (string2,length ,pad) //在str後用pad補充,直到長度爲length
15 RTRIM (string2 )//去除後端空格
16 STRCMP (string1,string2 ) //逐字符比較兩字串大小,
17 SUBSTRING (str , position[,length ])//從str的position開始,取length個字符,
18 注：mysql中處理字符串時，默認第一個字符下標爲1，即參數position必須大於等於1
19
20 mysql>selectsubstring('abcd',0,2);
21 +-----------------------+
22 |substring('abcd',0,2)|
23 +-----------------------+
24 | |
25 +-----------------------+
26 1 rowinset (0.00 sec)
27
28 mysql>selectsubstring('abcd',1,2);
29 +-----------------------+
30 |substring('abcd',1,2)|
31 +-----------------------+
32 | ab |
33 +-----------------------+
34 1 rowinset (0.02 sec)
35 TRIM([[BOTH|LEADING|TRAILING][padding]FROM]string2)//去除指定位置的指定字符
36 UCASE (string2 ) //轉換成大寫
37 RIGHT(string2,length)//取string2最後length個字符
38 SPACE(count)//生成count個空格
39 (2).數學類
40 ABS (number2 )//絕對值
41 BIN(decimal_number ) //十進制轉二進制
42 CEILING (number2 )//向上取整
43CONV(number2,from_base,to_base)//進制轉換
44 FLOOR (number2 )//向下取整
45 FORMAT (number,decimal_places )//保留小數位數
46 HEX(DecimalNumber ) //轉十六進制
47 注：HEX()中可傳入字符串，則返回其ASC-11碼，如HEX('DEF')返回4142143
48 也可以傳入十進制整數，返回其十六進制編碼，如HEX(25)返回19
49 LEAST (number , number2[,..])//求最小值
50 MOD (numerator,denominator ) //求餘
51 POWER (number ,power )//求指數
52 RAND([seed])//隨機數
53 ROUND (number[,decimals ])//四捨五入,decimals爲小數位數]
54 注：返回類型並非均爲整數，如：
55 (1)默認變爲整形值
56 mysql>selectround(1.23);
57 +-------------+
58 |round(1.23)|
59 +-------------+
60 | 1|
61 +-------------+
62 1 rowinset (0.00 sec)
63
64 mysql>selectround(1.56);
65 +-------------+
66 |round(1.56)|
67 +-------------+
68 | 2|
69 +-------------+
70 1 rowinset (0.00 sec)
71
72
73 (2)可以設定小數位數，返回浮點型數據
74 mysql>selectround(1.567,2);
75 +----------------+
76 |round(1.567,2)|
77 +----------------+
78 | 1.57|
79 +----------------+
80 1 rowinset (0.00 sec)
81 SIGN (number2 )//
82
83 (3).日期時間類
84 ADDTIME (date2,time_interval )//將time_interval加到date2
85 CONVERT_TZ(datetime2 ,fromTZ ,toTZ )//轉換時區
86 CURRENT_DATE ( )//當前日期
87 CURRENT_TIME ( )//當前時間
88 CURRENT_TIMESTAMP ( )//當前時間戳
89 DATE (datetime )//返回datetime的日期部分
90 DATE_ADD (date2 ,INTERVAL d_value d_type )//在date2中加上日期或時間
91 DATE_FORMAT (datetime ,FormatCodes )//使用formatcodes格式顯示datetime
92 DATE_SUB (date2 ,INTERVAL d_value d_type )//在date2上減去一個時間
93 DATEDIFF (date1 ,date2 )//兩個日期差
94 DAY (date )//返回日期的天
95 DAYNAME (date ) //英文星期
96 DAYOFWEEK (date )//星期(1-7) ,1爲星期天
97 DAYOFYEAR (date )//一年中的第幾天
98 EXTRACT(interval_name FROM date ) //從date中提取日期的指定部分
99 MAKEDATE (year ,day )//給出年及年中的第幾天,生成日期串
100 MAKETIME (hour ,minute ,second )//生成時間串
101 MONTHNAME (date ) //英文月份名
102 NOW ( ) //當前時間
103 SEC_TO_TIME (seconds ) //秒數轉成時間
104 STR_TO_DATE (string ,format )//字串轉成時間,以format格式顯示
105 TIMEDIFF (datetime1 ,datetime2 )//兩個時間差
106 TIME_TO_SEC (time ) //時間轉秒數]
107 WEEK (date_time [,start_of_week ]) //第幾周
108 YEAR (datetime )//年份
109 DAYOFMONTH(datetime)//月的第幾天
110 HOUR(datetime)//小時
111 LAST_DAY(date) //date的月的最後日期
112 MICROSECOND(datetime)//微秒
113 MONTH(datetime)//月
114 MINUTE(datetime)//分返回符號,正負或0
115 SQRT(number2)//開平方
（6）Mysql Workbench基礎教程
http://blog.csdn.net/janefir/article/details/17142963
持續更新，未完待續。