Question

任何人都可以为我解决问题吗？

我有一个最大长度的字符串数组。我想将所有字符串数组元素与单个SQL查询进行比较。我怎么能这样做？

<?php
//choices of tags, number of pictures, tag search based on given tags
//send back in Json format and decode json
    $api_key = '4eb66ae95c7e8fb8dd729ebf61541d79';
    if(isset($_POST['submit']))
{
    $tag1 = htmlspecialchars($_POST['tag1']);
    $tag2 = htmlspecialchars($_POST['tag2']);
    $tag3 = htmlspecialchars($_POST['tag3']);
    $tag = $tag1.",".$tag2.",".$tag3;

    $perPage = 25;
    $url = 'https://api.flickr.com/services/rest/?method=flickr.photos.search';
    $url.= '&api_key='.$api_key;
    $url.= '&tags='.$tag;
    $url.= '&per_page='.$perPage;
    $url.= '&format=json';
    $url.= '&nojsoncallback=1';

    $response = json_decode(file_get_contents($url));
    $photo_array = $response->photos->photo;

     //check each photo from server, and specifiy url to print   
    foreach($photo_array as $single_photo)
    {

        $farm_id = $single_photo->farm;
        $server_id = $single_photo->server;
        $photo_id = $single_photo->id;
        $secret_id = $single_photo->secret;
        $size = 'm';

        $title = $single_photo->title;

        $photo_url = 'http://farm'.$farm_id.'.staticflickr.com/'.$server_id.'/'.$photo_id.'_'.$secret_id.'_'.$size.'.'.'jpg';

        print "<img title='".$title."' src='".$photo_url."' />";

    }
    }

?>

字符串数组长度不固定，它是动态的。

例如：我的搜索字符串是“管理员登录错误”

然后我把它分成了

string[] new = searchtext;
select Qid from questions where qdescriptions like string[0],string[1],string[2]

分为三部分。我的预期结果应该包含数据库中的所有这三个字符串

喜欢这个

admin
login
error

希望你理解。结果应该包含单个搜索查询中的所有搜索字符串..

C＃代码：

Admin post this;
password change for login;
the error database;

Answer 1

试试这个

WITH CTE AS
(
   SELECT jo.name,Pr1.job_ID, Pr1.run_date, Pr1.run_time,pr1.run_status,
          Count(*) Over (Partition By Pr1.job_ID,Pr1.run_date,Pr1.run_time) As num,
          Row_Number() Over (Partition By Pr1.job_ID,Pr1.run_date,Pr1.run_time
                             Order By  pr1.run_date desc--, pr1.run_time desc
                             ) As Rn
   FROM   MSDB.dbo.sysjobhistory Pr1 
   join MSDB.dbo.sysjobs jo on jo.job_id=pr1.job_id
   JOIN MSDB.dbo.sysjobhistory Pr2 
         ON Pr1.job_ID = Pr2.job_ID --and pr1.run_status=pr2.run_status
         and pr1.run_date >=pr2.run_date and pr1.run_time >=pr2.run_time 
)
SELECT name,job_ID, run_date, run_time,run_status
FROM CTE
WHERE num <= 3 AND Rn = 1

创建一个功能

declare @searchtext nvarchar(max) = 'abc,def,pqr'

查询

 CREATE  FUNCTION [dbo].[fn_Split](@text varchar(8000), @delimiter varchar(20))
RETURNS @Strings TABLE
(   
  position int IDENTITY PRIMARY KEY,
  value varchar(8000)  
)
AS
BEGIN

DECLARE @index int
SET @index = -1

WHILE (LEN(@text) > 0)
  BEGIN 
    SET @index = CHARINDEX(@delimiter , @text) 
    IF (@index = 0) AND (LEN(@text) > 0) 
      BEGIN  
        INSERT INTO @Strings VALUES (@text)
          BREAK 
      END 
    IF (@index > 1) 
      BEGIN  
        INSERT INTO @Strings VALUES (LEFT(@text, @index - 1))  
        SET @text = RIGHT(@text, (LEN(@text) - @index)) 
      END 
    ELSE
      SET @text = RIGHT(@text, (LEN(@text) - @index))
    END
  RETURN
END

Answer 2

您可以通过动态创建SQL查询来执行此操作：

select * from yourtable y inner join (select value from 
fn_split(@searchtext,',')) as split on y.qdescriptions  like '%+split.value+%'

在应用程序中编写一个for循环遍历搜索数组的for循环：伪代码传入：

 string[] new = searchtext;
 String query = "select Qid from questions";

注意：这是伪代码，因为你没有说你正在使用什么编程语言等我无法告诉你for循环的实际语法是什么样的，或者如何保护你的查询不受sqlInjection < / p>

您的C＃代码应如下所示：

For(String searchstring in new){
   if(new.indexof(searchstring) === 0){
      query += " where qdescriptions like " + searchstring;
   }
   else{
   //depending on what you want to do here use OR or AND
      query += " or qdescriptions like " + searchstring;
   }

}

result = query.execute();

Answer 3

在C＃中，您可以像这样生成查询文本......

public static void Main()
{
    string final = GenerateParameters("tableName", "fieldName", new[] {"admin", "login", " error"});

    // execute query
    // final = "SELECT * FROM tableName WHERE fieldName LIKE '%admin%' OR fieldName LIKE '%login%' OR fieldName LIKE '% error%'"
}

static string GenerateParameters(string tableName, string fieldName, IEnumerable<string> searchTerms)
{            
    string sqlParameters = string.Join(" OR ", searchTerms.Select(x => "{0} LIKE '%{1}%'".FormatWith(fieldName, x)));
    return "SELECT * FROM {0} WHERE ".FormatWith(tableName) + sqlParameters;            
}

public static class StringExtensions
{
    public static string FormatWith(this string value, params object[] args)
    {
        return String.Format(value, args);
    }
}

在where子句中动态添加like运算符

3 个答案: