我如何创建一个和php函数类似的过程（优化加速）

我有一张像下面这样的桌子

mysql> select * from dts;
+----+------+------+--------+------+------+------+------+------+
| Id | key1 | key2 | serial | pr1  | pr2  | pr3  | pr4  | pr5  |
+----+------+------+--------+------+------+------+------+------+
|  1 |    1 |    1 |      1 |    0 |    0 |    1 |    0 |    2 |
|  2 |    1 |    1 |      2 |    0 |    0 |    0 |    0 |    0 |
|  3 |    1 |    1 |      3 |    0 |    0 |    0 |    1 |    0 |
|  4 |    1 |    1 |      4 |    1 |    0 |    1 |    1 |    3 |
|  5 |    1 |    2 |      5 |    0 |    0 |    0 |    2 |    5 |
|  6 |    1 |    2 |      6 |    0 |    0 |    0 |    0 |    1 |
|  7 |    1 |    2 |      7 |    0 |    1 |    0 |    0 |    0 |
|  8 |    2 |    2 |      1 |    1 |    1 |    1 |    1 |    2 |
|  9 |    2 |    2 |      2 |    0 |    0 |    0 |    0 |    0 |
| 10 |    3 |    2 |      3 |    0 |    0 |    0 |    0 |    0 |
| 11 |    3 |    3 |      1 |    1 |    1 |    0 |    0 |    1 |
| 12 |    3 |    3 |      5 |    0 |    0 |    1 |    1 |    0 |
+----+------+------+--------+------+------+------+------+------+
12 rows in set (0.00 sec)

我想将key1、key2、db、table和字段列表以逗号分隔传递给procedure，并想从这些字段中搜索select语句返回的记录的非零值，如果假设我得到所有非零值的字段，只需断开循环并返回字符串即可

下面我尝试使用php

function show_available($key1, $key2, $db, $table, $conn, $fields=null) 
{

/* Select all fields in argument from db table where key... */
$query = "select ".$fields." FROM $db.$table where key1=$key1 and key2=$key2";

/* Query */
$result = $conn->query($query , MYSQLI_USE_RESULT);

/* Output array  */
$out = array();
while($row=$result->fetch_assoc())
{
    /* Loop through fields */
    foreach($row as $key => $val)
    {
        /* If val is greater than 0*/
        if($val > 0 ){

            /*Ok we got field which has value greater than 0*/
            $out[$key]=1;   
        }       
    }
    /* If all fields are found ok in so many records where key1=x and key2=x, break loop */
    if(count($out) == count($field_arr))break;
}

/* Return which all fields has value greater than 0 */
return implode(',', array_keys($out));

 }

在相同的功能，我想转换成程序，以加快我的任务，并希望有如下输出，如何可能，请帮助别人

如果我传递一些过程1,1，db，table，'pr1，pr2，pr3，pr4，pr5'，我想得到输出pr1，pr3，pr4，pr5，因为当key1=1和key2=1时

对于键1=2和键2=2，情况类似

|  8 |    2 |    2 |      1 |    1 |    1 |    1 |    1 |    2 | - Found pr1-pr5, break loop and return string
|  9 |    2 |    2 |      2 |    0 |    0 |    0 |    0 |    0 |

预期产量

# For procedure call expected o/p
key1       key2 fields_non_zero
1           1   pr1,pr3,pr4,pr5

1           2   pr2,pr4,pr5

2           2   pr1,pr2,pr3,pr4,pr5

3           2

3           3   pr1,pr2,pr3,pr4,pr5

表转储

DROP TABLE IF EXISTS `dts`;
CREATE TABLE `dts` (
  `Id` int(11) NOT NULL AUTO_INCREMENT,
  `key1` int(11) DEFAULT '-99',
  `key2` int(11) DEFAULT '-99',
  `serial` int(11) DEFAULT '-99',
  `pr1` int(11) DEFAULT '-99',
  `pr2` int(11) DEFAULT '-99',
  `pr3` int(11) DEFAULT '-99',
  `pr4` int(11) DEFAULT '-99',
  `pr5` int(11) DEFAULT '-99',
  PRIMARY KEY (`Id`),
  KEY `main` (`key1`,`key2`,`serial`)
) ENGINE=MyISAM AUTO_INCREMENT=13 DEFAULT CHARSET=latin1;


LOCK TABLES `dts` WRITE;
INSERT INTO `dts` VALUES (1,1,1,1,0,0,1,0,2),(2,1,1,2,0,0,0,0,0),(3,1,1,3,0,0,0,1,0),(4,1,1,4,1,0,1,1,3),(5,1,2,5,0,0,0,2,5),(6,1,2,6,0,0,0,0,1),(7,1,2,7,0,1,0,0,0),(8,2,2,1,1,1,1,1,2),(9,2,2,2,0,0,0,0,0),(10,3,2,3,0,0,0,0,0),(11,3,3,1,1,1,0,0,1),(12,3,3,5,0,0,1,1,0);
UNLOCK TABLES;

---

您需要的是使用max进行聚合，或使用concat_ws进行求和：

---

我不知道你在问什么，上面的代码似乎传递回了数据。我想创建过程，我不知道如何在mysql中创建它，我可以编写phpfunction@user3637224-您可以直接使用上述SQL或查看。您可以在过程中使用上述查询并返回结果。但它不会中断循环，对于LAC行，如果使用sum或max，则速度会很慢。@user3637224-如果您认为循环会更快，那么您就错了。最快的解决方案通常是基于SQL的，而不是过程性的。我是否可以花更多的时间检查我的数据，选择countdistinct key1，key2是541665？表总计数为113441280

DROP TABLE IF EXISTS `dts`;
CREATE TABLE `dts` (
  `Id` int(11) NOT NULL AUTO_INCREMENT,
  `key1` int(11) DEFAULT '-99',
  `key2` int(11) DEFAULT '-99',
  `serial` int(11) DEFAULT '-99',
  `pr1` int(11) DEFAULT '-99',
  `pr2` int(11) DEFAULT '-99',
  `pr3` int(11) DEFAULT '-99',
  `pr4` int(11) DEFAULT '-99',
  `pr5` int(11) DEFAULT '-99',
  PRIMARY KEY (`Id`),
  KEY `main` (`key1`,`key2`,`serial`)
) ENGINE=MyISAM AUTO_INCREMENT=13 DEFAULT CHARSET=latin1;


LOCK TABLES `dts` WRITE;
INSERT INTO `dts` VALUES (1,1,1,1,0,0,1,0,2),(2,1,1,2,0,0,0,0,0),(3,1,1,3,0,0,0,1,0),(4,1,1,4,1,0,1,1,3),(5,1,2,5,0,0,0,2,5),(6,1,2,6,0,0,0,0,1),(7,1,2,7,0,1,0,0,0),(8,2,2,1,1,1,1,1,2),(9,2,2,2,0,0,0,0,0),(10,3,2,3,0,0,0,0,0),(11,3,3,1,1,1,0,0,1),(12,3,3,5,0,0,1,1,0);
UNLOCK TABLES;

select
    key1, key2, 
    concat_ws(
        ',',
        case when max(pr1) <> 0 then 'pr1' end,
        case when max(pr2) <> 0 then 'pr2' end,
        case when max(pr3) <> 0 then 'pr3' end,
        case when max(pr4) <> 0 then 'pr4' end,
        case when max(pr5) <> 0 then 'pr5' end
    ) as val
from dts
group by key1, key2;

key1    key2    val
1       1       pr1,pr3,pr4,pr5
1       2       pr2,pr4,pr5
2       2       pr1,pr2,pr3,pr4,pr5
3       2       
3       3       pr1,pr2,pr3,pr4,pr5