MySQL使用--組み込み関数編

CHARSET(str) //       
CONCAT (string2 [,... ]) //    
INSTR (string ,substring ) //  substring   string      ,     0
LCASE (string2 ) //     
LEFT (string2 ,length ) // string2      length   
LENGTH (string ) //string  
LOAD_FILE (file_name ) //       
LOCATE (substring , string [,start_position ] )  INSTR,        
LPAD (string2 ,length ,pad ) //   pad  string  ,       length
LTRIM (string2 ) //      
REPEAT (string2 ,count ) //  count 
REPLACE (str ,search_str ,replace_str ) // str  replace_str  search_str
RPAD (string2 ,length ,pad) // str  pad  ,     length
RTRIM (string2 ) //      
STRCMP (string1 ,string2 ) //          ,
SUBSTRING (str , position [,length ]) // str position  , length   ,
 ：mysql       ，          1 ，   position      1
TRIM([[BOTH|LEADING|TRAILING] [padding] FROM]string2) //           
UCASE (string2 ) //     
RIGHT(string2,length) // string2  length   
SPACE(count) //  count   

ABS (number2 ) //   
BIN (decimal_number ) //       
CEILING (number2 ) //    
CONV(number2,from_base,to_base) //    
FLOOR (number2 ) //    
FORMAT (number,decimal_places ) //      
HEX (DecimalNumber ) //     
 ：HEX()       ，    ASC-11 ，  HEX(’DEF’)  4142143
          ，         ， HEX(25)  19
LEAST (number , number2 [,..]) //    
MOD (numerator ,denominator ) //  
POWER (number ,power ) //   
RAND([seed]) //   
ROUND (number [,decimals ]) //    ,decimals     ]
 ：          
SIGN (number2 ) //    ,   0
SQRT(number2) //   

ADDTIME (date2 ,time_interval ) // time_interval  date2
CONVERT_TZ (datetime2 ,fromTZ ,toTZ ) //    
CURRENT_DATE ( ) //    
CURRENT_TIME ( ) //    
CURRENT_TIMESTAMP ( ) //     
DATE (datetime ) //  datetime     
DATE_ADD (date2 , INTERVAL d_value d_type ) // date2        
DATE_FORMAT (datetime ,FormatCodes ) //  formatcodes    datetime
DATE_SUB (date2 , INTERVAL d_value d_type ) // date2       
DATEDIFF (date1 ,date2 ) //     
DAY (date ) //      
DAYNAME (date ) //    
DAYOFWEEK (date ) //  (1-7) ,1    
DAYOFYEAR (date ) //       
EXTRACT (interval_name FROM date ) // date          
MAKEDATE (year ,day ) //          ,     
MAKETIME (hour ,minute ,second ) //     
MONTHNAME (date ) //     
NOW ( ) //    
SEC_TO_TIME (seconds ) //      
STR_TO_DATE (string ,format ) //      , format    
TIMEDIFF (datetime1 ,datetime2 ) //     
TIME_TO_SEC (time ) //     ]
WEEK (date_time [,start_of_week ]) //   
YEAR (datetime ) //  
DAYOFMONTH(datetime) //     
HOUR(datetime) //  
LAST_DAY(date) //date       
MICROSECOND(datetime) //  
MONTH(datetime) // 
MINUTE(datetime) // 

DAY ,DAY_HOUR ,DAY_MINUTE ,DAY_SECOND ,HOUR ,HOUR_MINUTE ,HOUR_SECOND ,MINUTE ,MINUTE_SECOND,MONTH ,SECOND ,YEAR

http://dev.mysql.com/doc/refman/5.1/zh/stored-procedures.html