I have the following PDO statement:
$stmt = $db->prepare("SELECT MAX(RID) FROM TEMP_ROUTE");
$stmt->execute();
$rid = $stmt->fetch(PDO::FETCH_ASSOC);
$rid = (int) $rid["MAX(RID)"];
Is there any way so that I don't have to do the last statement there. In other words I want it to fetch $rid["MAX(RID)"] when doing the fetch.
Have a look at http://www.php.net/manual/en/pdostatement.bindcolumn.php and try using PDO::FETCH_BOUND instead perhaps? This won't make it shorter though. Or try something like this, from http://www.php.net/manual/en/pdostatement.fetch.php:
$stmt = $db->prepare("SELEXT MAX(RID) AS max FROM TEMP_ROUTE");
$stmt->execute();
$rid = $stmt->fetch(PDO::FETCH_OBJ)->MAX;
Related
I have a mysql query that targets a single column in a single row
"SELECT some_col_name FROM table_name WHERE user=:user"
After I execute the statement $stmt->execute(); how do I get this single cell directly placed into a variable with no loops? In other words how to get
from $stmt->execute();
to $col_value = 100;
I tried the 2 below, but neither worked.. The column is number 4 in the original table, but I'm assuming since in my select statement I'm selecting it only, it should be 1 when I specify the parameter for fetchColumn.
$col_value = $stmt->fetchColumn();
$col_value = $stmt->fetchColumn(0);
As you can see, I'm trying to do it in as few lines as possible.
Are you sure it's returning any rows?
$stmt->fetchColumn()
is correct way to fetch a single value, so either you probably didn't bind the :user parameter or it simply returned no rows.
$sql='SELECT some_col_name FROM table_name WHERE user=?';
$sth=$pdo_dbh->prepare($sql);
$data=array($user);
$sth->execute($data);
$result=$sth->fetchColumn();
I'm not sure why so many people mess this up:
$stmt = $dbh->prepare("SELECT `column` FROM `table` WHERE `where`=:where");
$stmt->bindValue(':where', $MyWhere);
$stmt->execute();
$SingleVar = $stmt->fetchColumn();
Make sure that you are selecting a specific column in the query and not * or you will need to specify the column order number in fetchColumn(), example: $stmt->fetchColumn(2); That usually isn't a good idea because the columns in the database may be reorganized by, someone...
This will only work properly with unique 'wheres'; fetchColumn() will not return an array.
When you want to get the last insert you add the DESC Limit 1 to the sql statement.
$sql = "SELECT `some_col_name` FROM table_name\n"
. "ORDER BY `some_col_name` DESC\n"
. "LIMIT 1";
$stmt = $conn->prepare($sql);
$result = $stmt->execute();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
//convert the array content to string and store in variable
$col = implode(" ", $row);
echo $col;
Have you prepared the statement first? (Before $stmt->execute())
$stmt = $db->prepare("SELECT some_col_name FROM table_name WHERE user=:user");
You could use this:
$stmt->fetch(PDO::FETCH_COLUMN, $number_of_column);
When I run the code below, it returns nothing. When I explicitly type a string in the place of the '?', it will return the expected result but using the prepared version has not worked for me thus far. I do not believe there is any kind of versioning issue as using prepared statements for INSERT queries has worked for me in the past. What might be the problem here with the prepared statement?
$pdo = new PDO("mysql:host=localhost;dbname=database", $user, $pass);
$sql = "SELECT * FROM table WHERE column LIKE '%?%';";
$stmt = $pdo->prepare($sql);
$stmt->execute(array($_GET['searchterm']));
$results = $stmt->fetchAll();
print_r($results);
You are preparing the value so it isn't behaving as if you just put the string inside of the query.
When preparing a string you don't need to add " or ', that is done for you. You need to add the %'s into the value that you are escaping.
$pdo = new PDO("mysql:host=localhost;dbname=database", $user, $pass);
$sql = "SELECT * FROM table WHERE column LIKE ?;";
$stmt = $pdo->prepare($sql);
$stmt->execute(array("%{$_GET['searchterm']}%"));
$results = $stmt->fetchAll();
print_r($results);
Working fine with MsSQL:
$ppage = 15;
$poset = 0;
$stmt = "SELECT * FROM tbl ORDER BY ID OFFSET {:$poset } ROWS FETCH NEXT {:ppage } ROWS ONLY";
$stmt = $this->conn->prepare($stmt);
$stmt->execute();
return $row = $stmt->fetchAll();
Not working fine with MsSQL:
$ppage = 15;
$poset = 0;
$stmt = "SELECT * FROM tbl ORDER BY ID OFFSET :poffset ROWS FETCH NEXT :perpage ROWS ONLY";
$stmt = $this->conn->prepare($stmt);
$stmt->bindParam(':poffset', $poset);
$stmt->bindParam(':perpage', $ppage);
$stmt->execute();
return $row = $stmt->fetchAll();
the query is fine with I use to run with variables actual data it works but it's not working when I set the variable by bindParam, when am I missing.
thanks in advance.
Try using bindValue instead:
$stmt = $this->conn->prepare($stmt);
$stmt->bindValue(':poffset', $poset, PDO::PARAM_INT);
$stmt->bindValue(':perpage', $ppage, PDO::PARAM_INT);
$stmt->execute();
Rather than using the bindParam() function, inside of the parameters of the execute() function, add an array containing the values.
Something like this:
$stmt = $this->conn->prepare($stmt);
$stmt->execute(array(':poffset' => $poset, ':perpage' => $ppage)); // using an array rather than the bindValue function.
Use it as you would normally with the bindParam function, but substitute the commas for =>.
This way of doing things will save you having to call the bindParam() function for each value & will still protect against SQL Injection.
All the examples and documentation didnt really help or even offer an example for this so I m gonna ask here:
$db = new SQLite3(database.db);
$stmt = $db->prepare('SELECT COUNT(uid) FROM kunden WHERE date = :date');
$stmt->bindValue(':ldate',$today,SQLITE3_TEXT);
$result = $stmt->execute;
How can I get the result from that prepared statement? I know execute is not supposed to return a result. I tried using query and query_single but that didnt work. var_dump($result->fetchArray()); also didnt work. Help is much appreciated.
SQLite3Stmt::execute() is a function, and needs to be called as such:
$db = new SQLite3('database.db');
$stmt = $db->prepare('SELECT COUNT(uid) FROM kunden WHERE date = :date');
$stmt->bindValue(':ldate',$today,SQLITE3_TEXT);
$result = $stmt->execute();
You can then fetch the result like this:
$array = $result->fetchArray();
echo $array['COUNT(uid)'];
I have a mysql query that targets a single column in a single row
"SELECT some_col_name FROM table_name WHERE user=:user"
After I execute the statement $stmt->execute(); how do I get this single cell directly placed into a variable with no loops? In other words how to get
from $stmt->execute();
to $col_value = 100;
I tried the 2 below, but neither worked.. The column is number 4 in the original table, but I'm assuming since in my select statement I'm selecting it only, it should be 1 when I specify the parameter for fetchColumn.
$col_value = $stmt->fetchColumn();
$col_value = $stmt->fetchColumn(0);
As you can see, I'm trying to do it in as few lines as possible.
Are you sure it's returning any rows?
$stmt->fetchColumn()
is correct way to fetch a single value, so either you probably didn't bind the :user parameter or it simply returned no rows.
$sql='SELECT some_col_name FROM table_name WHERE user=?';
$sth=$pdo_dbh->prepare($sql);
$data=array($user);
$sth->execute($data);
$result=$sth->fetchColumn();
I'm not sure why so many people mess this up:
$stmt = $dbh->prepare("SELECT `column` FROM `table` WHERE `where`=:where");
$stmt->bindValue(':where', $MyWhere);
$stmt->execute();
$SingleVar = $stmt->fetchColumn();
Make sure that you are selecting a specific column in the query and not * or you will need to specify the column order number in fetchColumn(), example: $stmt->fetchColumn(2); That usually isn't a good idea because the columns in the database may be reorganized by, someone...
This will only work properly with unique 'wheres'; fetchColumn() will not return an array.
When you want to get the last insert you add the DESC Limit 1 to the sql statement.
$sql = "SELECT `some_col_name` FROM table_name\n"
. "ORDER BY `some_col_name` DESC\n"
. "LIMIT 1";
$stmt = $conn->prepare($sql);
$result = $stmt->execute();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
//convert the array content to string and store in variable
$col = implode(" ", $row);
echo $col;
Have you prepared the statement first? (Before $stmt->execute())
$stmt = $db->prepare("SELECT some_col_name FROM table_name WHERE user=:user");
You could use this:
$stmt->fetch(PDO::FETCH_COLUMN, $number_of_column);