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        PHP編程

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        php數(shù)據(jù)庫數(shù)據(jù)相加 php數(shù)據(jù)庫添加數(shù)據(jù)語句

        來源:本站原創(chuàng)|時間:2023-04-02|欄目:PHP編程|點擊: 次

        php數(shù)組值如何正確相加

        //摘自php5手冊

        ?php

        $a = array(2, 4, 6, 8);

        echo "sum(a) = " . array_sum($a) . "\n";

        $b = array("a" = 1.2, "b" = 2.3, "c" = 3.4);

        echo "sum(b) = " . array_sum($b) . "\n";

        ?

        在php中怎樣將數(shù)據(jù)庫中文本型數(shù)據(jù)求和

        可以直接使用mysql的sum函數(shù)求和,mysql會自動轉(zhuǎn)換為數(shù)字型進行求和.

        php 數(shù)據(jù)庫 怎么把數(shù)據(jù)庫查詢到返回的兩個值相加(學習中。。)

        $sql_cpgg="select?*?from?qd_zbcy?where?zbcy_name=?'$cpgg'";?

        $query=mysql_query($sql_cpgg);

        ?while($row_cpgg=mysql_fetch_array($query)){

        $a=$row_cpgg[zbcy_canshu];//把結果賦值給變量a

        };??

        //這個返回的是7

        $sql_zzlx="select?*?from?qd_zbcy?where?zbcy_name=?'$zzlx'";

        $query=mysql_query($sql_zzlx);

        while($row_zzlx=mysql_fetch_array($query)){

        ??

        ??$b=$row_zzlx[zbcy_canshu]?;//把結果賦值給變量b

        ??//這個返回的是8

        ??}

        ??echo?$a+$b;//這返回15

        php 數(shù)據(jù)庫 求和

        SELECT SUM(分數(shù)) FROM 表a WHERE 性別='男'

        SELECT SUM(分數(shù)) FROM 表a WHERE 性別='女'

        ----測試

        CREATE TABLE MASK_TEST(

        ID INT,

        姓名 varchar(20),

        性別 varchar(20),

        年齡 int,

        分數(shù) int

        )

        INSERT INTO MASK_TEST VALUES(11,'ZHANG SAN','男',20,88)

        INSERT INTO MASK_TEST VALUES(11,'LIU SHAN','女',20,83)

        INSERT INTO MASK_TEST VALUES(11,'WANG SAN','男',20,87)

        INSERT INTO MASK_TEST VALUES(11,'ZHANG TING','女',20,83)

        INSERT INTO MASK_TEST VALUES(11,'ZHAO YAN','女',20,88)

        INSERT INTO MASK_TEST VALUES(11,'ZHOU HU','男',20,78)

        INSERT INTO MASK_TEST VALUES(11,'WANG QIANG','男',20,98)

        INSERT INTO MASK_TEST VALUES(11,'LI QIAN','女',21,68)

        SELECT SUM(分數(shù)) FROM MASK_TEST WHERE 性別='男'

        SELECT SUM(分數(shù)) FROM MASK_TEST WHERE 性別='女'

        ----結果:

        (1 行受影響)

        (1 行受影響)

        (1 行受影響)

        (1 行受影響)

        (1 行受影響)

        (1 行受影響)

        (1 行受影響)

        (1 行受影響)

        -----------

        351

        (1 行受影響)

        -----------

        322

        (1 行受影響)

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