etl vs elt

CONCAT_WS (',', 'First name', NULL, 'last name');-> 'first name, Last name' CONCAT_WS () does not ignore any null strings. (However, all NULL values are ignored ). ◆ CONV (N, from_base, to_base) Convert numbers between different bases. The return value is the N string of the number, which is converted from from_base to to_base base. If any parameter is NULL, the return value is NULL. The Independent Variable N is interpreted as an integer, but can be specified as an integer or string. The minim

consisting of space characters. mysql> select SPACE(6); -> ' ' REPLACE(str,from_str,to_str) Returns a string. str, Its string from_strAll appear by string to_strReplacement. mysql> select REPLACE('www.mysql.com', 'w', 'Ww'); -> 'WwWwWw.mysql.com' This function is reliable for multiple bytes. REPEAT(str,count) Returns a duplicate countTimes string strA string. If count Returns an empty string. If strOr countYes NULL, Return NULL. m

.mysql.com' This function is reliable for multiple bytes. REPEAT (str, count) Returns a string consisting of str strings that repeat countTimes. If count Mysql> select REPEAT ('mysql', 3 ); -> 'Mysqlmysqlmysqlmysql' REVERSE (str) Returns the str string in the reversed character order. Mysql> select REVERSE ('ABC '); -> 'CBA' This function is reliable for multiple bytes. INSERT (str, pos, len, newstr) Returns the str string, which is the substring starting from the position pos and is replaced b

; select SOUNDEX ('hello '); -> 'H400' Mysql> select SOUNDEX ('quadratically '); -> 'Q36324' SPACE (N) Returns a string consisting of N spaces. Mysql> select SPACE (6 ); ->'' REPLACE (str, from_str, to_str) Returns the str string, which is replaced by the to_str character string. Mysql> select REPLACE ('www .mysql.com ', 'w', 'ww '); -> 'Wwwwww .mysql.com' This function is reliable for multiple bytes. REPEAT (str, count) Returns a string consisting of str strings that repeat countTimes. If count

; if (_ timeScale! = 1.0f) {dt * = _ timeScale;} // timer callback // tListEntry * entry, * tmp; // For a queue whose priority is less than 0 in the Update timer, run DL_FOREACH_SAFE (_ updatesNegList, entry, tmp) {if ((! Entry-> paused )(! Entry-> markedForDeletion) {entry-> callback (dt) ;}// The following is the DL_FOREACH_SAFE (_ updates0List, entry, tmp) {if ((! Entry-> paused )(! Entry-> markedForDeletion) {entry-> callback (dt) ;}// Finally, DL_FOREACH_SAFE (_ updatesPosList, entry, tmp)

to be an integer, but can be specified as an integer or a string. The minimum cardinality is 2, and the maximum base is 36. If To_base is a negative number, then N is treated as a signed count. Otherwise, N is considered an unsigned number. The CONV () operates at a precision of 64 bits. Mysql> Select CONV (' A ', 16,2);-> ' 1010 ' mysql> select CONV (' 6E ', 18,8);-> ' 172 ' mysql> select CONV ( -17,10,- ;-> '-h ' mysql> SELECT CONV (10+ ' + ' +0xa,10,10 ');-> ' 40 '

the string str of the reversed character order.Mysql> Select REVERSE (' abc ');-> ' CBA ' This function is reliable for multiple bytes. INSERT (STR,POS,LEN,NEWSTR)Returns the string str, the substring at the beginning of the position Pos and the Len character long substring is replaced by the string newstr.Mysql> Select INSERT (' Quadratic ', 3, 4, ' What ');-> ' quwhattic ' This function is reliable for multiple bytes. ELT (N,STR1,STR2,STR3,...)If n

; Select SOUNDEX (' Hello '); ' H400 ' Mysql> Select SOUNDEX (' quadratically '); ' Q36324 ' SPACE (N) Returns a string consisting of n space characters. Mysql> Select SPACE (6); "" REPLACE (STR,FROM_STR,TO_STR) Returns the string str, whose string from_str all occurrences are replaced by the string to_str. Mysql> Select REPLACE (' www.mysql.com ', ' w ', ' Ww '); ' WwWwWw.mysql.com ' This function is reliable for multiple bytes. REPEAT (Str,count) Returns a string consisting of the string str t

string. If str or count Yes NULL , return NULL . Mysql> Select REPEAT (' MySQL ', 3); ' Mysqlmysqlmysql ' REVERSE(str) Returns a string that reverses the order of characters str . Mysql> Select REVERSE (' abc '); ' CBA ' This function is reliable for multiple bytes. INSERT(str,pos,len,newstr) returns str a string in which the substring at pos the beginning

NULL , return NULL . Mysql> Select REPEAT (' MySQL ', 3); ' Mysqlmysqlmysql ' REVERSE(str) Returns a string that reverses the order of characters str . Mysql> Select REVERSE (' abc '); ' CBA ' This function is reliable for multiple bytes. INSERT(str,pos,len,newstr) returns str a string in which the substring at pos the beginning of the position and len character

assign the string to null. # # # ELT *elt (N,STR1,STR2,STR3,...) * This function is a supplementary function of the field function, according to the value of N to select the nth string, such as sex in the data table is generally stored as a number, such as 1 for the male, 2 for the female, when we need to show the gender code according to sex, we can use the ELT