Prepared statement with placeholders - order or names are important

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  Thank you

  Steve M

  Hello
   
   
  a. What are the data you're trying to move?
  b. what operating system (for example Windows files) files?
  c. What is the method that you use to copy data?
   
   
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  Thank you, and in what concerns:
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  Visit our Microsoft answers feedback Forum and let us know what you think.
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• Table query result using prepared as a parameter in the prepared statement later

  Hi all

  Very new to PHP. A series of 3 prepared statements (see code below), I'm trying to sink.  This page is triggered from a link on a page that lists the individual and all candidates which works well.  Prepared statement 1 works and displays the data in the columns line wanted specific, bottom access so I would call it record and areas, but I think it is called line and columns here.  Prepared Statement 2 which hands on a table of cross references (we have a many-to-many relationship between candidates and positions, therefore for the table of cross references) works and I can say the $selected_positions charges table, because I can see position_id data in the < body > of the file using this:

  <? PHP

  foreach ($selected_positions as $item) {}

  echo $item. "< br / > ';

  }

  ? >

  Can't take this $selected_positions table and use it as parameter in the prepared statement 3, at least not how I try to do.  So obviously he manages not prepared statement 3 no way is a table that I called $the_positions which is supposed to contain the ID of the post, position of securities and to position the position_id numbers that are in the array $selected_positions.  I can say that 3 of prepared statement is a failure because there is no indication in this table that is in the < body > of the file:

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  < b >

  Identification of the Position < /th > < th >

  < /Th > < th > post number

  Title < th > < /th >

  < /tr >

  <? PHP while ($stmt-> fetch()) {? >}

  < b >

  < td > <? = $position_id;? > < table >

  < td > <? = $position_number;? > < table >

  < td > <? = $title;? > < table >

  < /tr >

  <? PHP}? >

  < /table >

  Here is the PHP script:

  <? PHP

  require_once '... /includes/session_timeout_db.php';

  ? >

  <? PHP

  require_once '... /includes/Connection.php';

  initialize the flag

  $OK = false;

  $conn = dbConnect ('read');

  initialize statement

  $stmt = $conn-> stmt_init();

  If (isset($_GET['candidate_id'])) {}

  $sql = ' SELECT candidate_id, last_name, first_name, society, mas_number, last_modified, notes

  CANDIDATES WHERE candidate_id =?'; }

  If ($stmt-> {prepared ($sql))}

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  run the query and fetch the result

  $OK = $stmt-> execute();

  bind the results to variables

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  $stmt-> fetch();

  free resources for the second query database

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  }

  get the associated positions candidate

  $sql = 'SELECT position_id FROM pos2cands WHERE candidate_id =?';

  If ($stmt-> {prepared ($sql))}

  bind the query parameter

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  run the query and fetch the result

  $OK = $stmt-> execute();

  $stmt-> bind_result ($position_id);

  Browse the results to store in a table

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  While ($stmt-> fetch() {)}

  [] $selected_positions = $position_id;

  }

  }

  find data on the position of the table

  $sql = ' SELECT position_id, position_number, title

  FROM place WHERE position_id =?';

  If ($stmt-> {prepared ($sql))}

  bind the query parameter

  $stmt-> bind_param ('i', $_GET [$position_id]);

  run the query and fetch the result

  $OK = $stmt-> execute();

  bind the results to variables

  $stmt-> bind_result ($position_id, $position_number, $title);

  Browse the results to store in a table

  $the_positions = [];

  While ($stmt-> fetch() {)}

  [] $the_positions = $position_id;

  }

  }

  Get the error message if the request fails

  If (isset ($stmt) & &! $OK) {}

  $error = $stmt-> error;

  }

  If (! $stmt) {}

  $error = $conn-> error;

  } else {}

  $numRows = $stmt-> num_rows;

  }

  ? >

  Thank you in advancel

  You want to use the value of request 1 or query2 as a parameter in the query 3, right? Rather than build a table, you can simply use the value returned by each line that the query returns. I use PDO, no MySQLi, so I can't knock out quickly the MySQLi example for you.

  While ($result = $sql-> fetch (PDP::FETCH_ASSOC)) {}
  $field = $result ['domain'];

  Now we can use the value of $field as parameter for the next query.

  The brace that closes the while loop is placed after the last query

  so no need to fill an array with values

  }

  Your approach is doable with a few changes to the way in which you go through the table, but it is unnecessarily complicated.

  You might be able to use a single query to get all the data if you use left joins. With this approach, you start with the table that SHOULD return a result or which requires no dependencies to other tables. The structure is like this:

  SELECT field1, Field2, field3 FROM (SELECT * FROM table1 WHERE field3 = param1) has

  LEFT JOIN (SELECT * FROM table2 WHERE A.field4 = table2.field4) B

  LEFT JOIN table3 ON table3.field5 = B.field5 ORDER BY Field1

  A and B above are aliases for subsets of the table. You can image a (tacit) sign = equal A

• Time of the value of a prepared statement and the differences in execution plan

  Hi guys... I have a doubt here that I was not able to specify the search on the internet.
  
  Is on prepared statements...
  
  When I do: con.prepareStatement (query);
  
  then the query is compiled and an execution plan is for this query on the database, I know. But what happens when I do con.close. Is the accessible yet statement caching other executions? to make this example:
  
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  Is the precompiled stuff avaible if I use a "" "NEW" "" said PreparedStatement with the same query?
  
  Thank you very much in advance for your answers...
  
  Published by: user4789473 on 25-mar-2013 17:14

  If you lose / close the statement prepared, Yes, you lose the ID. If you prepare again the same
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  [If this post was helpful, please click the button "Vote as helpful" (green triangle). If it can help solve your problem, click on the button 'Propose as answer' or 'mark as answer '. [By proposing / marking a post as answer or useful you help others find the answer more quickly.]

• Error no prepared statement

  OS 7.1

  SQLite DB

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              Statement statement;
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  Should be present

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  Well.  Who lost a lot of my time.

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