i am trying to update a table column which same column from same table select.
Here is the code (updated)
public function UpdateStockIn($id, $subUnitValue) {
$query = "UPDATE BRAND_LIST SET CURRENT_STOCK_BOTTLE = (SELECT CURRENT_STOCK_BOTTLE FROM BRAND_LIST WHERE ID = ?) + '.$subUnitValue.' WHERE ID = ? ";
$success = 0;
try {
$stmt = $this->conn->prepare($query);
$stmt->bindParam(1, $id);
$stmt->bindParam(2, $id);
$stmt->execute();
$success = 1;
} catch (PDOException $ex) {
echo $ex->getMessage();
}
return $success;
}
it Show error like this
You can't specify target table 'BRAND_LIST' for update in FROM clause
Try run these 2 sqls, The first one will store a value into mysql local variable then use into 2nd sql.
SELECT #old_subUnitValue := GROUP_CONCAT(table1.CURRENT_STOCK_BOTTLE) FROM BRAND_LIST AS table1 WHERE table1.ID=2;
UPDATE BRAND_LIST AS table2 SET table2.CURRENT_STOCK_BOTTLE = #old_subUnitValue + '.$subUnitValue.' WHERE table2.ID=2;
Use the below query
$query = "UPDATE BRAND_LIST SET CURRENT_STOCK_BOTTLE = CURRENT_STOCK_BOTTLE + ".$subUnitValue." WHERE ID = ?";
Related
I'm executing a multi-delete DELETE query, like so:
$query = "DELETE FROM foo WHERE 1 = 1; DELETE FROM bar WHERE 1 = 1";
$statement = $this->getEntityManager()->getConnection()->prepare($query);
$statement->execute();
I'm aware that I can use $statement->getRowCount() if my query contained a single delete, but how can I both row counts?
AFAIK there is no way doing this in doctrine, but another solution could be:
$queries = [
"DELETE FROM foo WHERE 1 = 1;",
"DELETE FROM bar WHERE 1 = 1;"
];
$connection = $this->getEntityManager()->getConnection();
$affectedRows = 0;
foreach($queries as $query)
{
$statement = $connection->prepare($query);
$statement->execute();
$affectedRows = $affectedRows + $statement->getRowCount();
}
Here i am trying to increment the value in database by + 1.for example
here in database i have value 3 in one column by name owners now when i call the below function. i want to increment the column by +1 i.e the column value now should become 4
function updateOwners($product_id){
// Create connection
$conn = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
if ($conn->connect_error)
{
die("Connection failed: " . $conn->connect_error);
}
$sql = "UPDATE product_list set product_current_co_owners = where product_id ='$product_id'";
$result = $conn->query($sql);
/*if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo '<b>Total co-owners:</b><br><span>'.$row["product_co_owners"].'</span>';
}
} else {
echo "No data available";
}*/
$conn->close();
}
how can i do this?
$sql = "UPDATE product_list set product_current_co_owners =# here i want add +1 to previous value where product_id ='$product_id'";
Just add +1 to the previous value like
UPDATE product_list
set product_current_co_owners = product_current_co_owners + 1
where product_id ='$product_id';
Try this but your column must be integer type
UPDATE product_list set product_current_co_owners =product_current_co_owners+1 where product_id ='$product_id'
$sql = "UPDATE product_list set product_current_co_owners = owners + 1 where product_id ='$product_id'";
I am very confused about this (returning false):
$sql = "SELECT * from tbl_user WHERE group = 'abc'";
$res = mysql_query($sql);
if(mysql_num_rows($res) > 0) {
$response = array('status' => '1');
} else {
$response = array('status' => '0'); // ---> what I get back
die("Query failed");
}
...despite the fact the field group is present in mySQL database. Even more strange is that the following return the value of group:
$SQL = "SELECT * FROM tbl_user";
$result = mysql_query($SQL);
while ($db_field = mysql_fetch_assoc($result)) {
print $db_field['group']; // ---> returns 'abc'
When I execute a WHERE clause with every other fields of my table excepting group (for example WHERE name = 'ex1' AND ID=1 AND isAllowed=0 (and so on...), everything is fine. As soon as I insert group = 'abc', I get nothing...
This makes me mad. If anyone could help... (I am running a local server with MAMP).
Thanks a lot!
The issue is that group is a reserved word in SQL.
For MySql you need to escape it with backticks
`group`
So your query would be
$sql = "SELECT * from tbl_user WHERE `group` = 'abc'";
I am having a weird issue but I do not understand what is happening. I amcreated a function to update up to three columns (end_plan_date, balance and server) in a table (user) and 2 inserts in another table.
For some reason, my last update (column server of the user table) is not committed ($query = mysql_query("UPDATE user SET server='$serv' WHERE email='$subemail'");) unless I give a value for at leat one of the two other values ($subamt or $subday).
Do you know why this query is not updating the user table with the server value I parsed?
function addBalance($subemail, $subamt,$subday,$userid,$serv) {
$q = "SELECT * FROM user WHERE email = '$subemail'";
$result = mysql_query($q, $this->connection);
$dbarray = mysql_fetch_array($result);
$endplan_date=$dbarray['end_plan_date'];
if($subday >0){
if($endplan_date=="0000-00-00" ){
$endplan_date = date('Y-m-d');
$new_endplan_date = date('Y-m-d',strtotime($endplan_date . "+".$subday." days"));
}else{
$new_endplan_date = date('Y-m-d',strtotime($endplan_date . "+".$subday." days"));
}
$query = mysql_query("UPDATE user SET end_plan_date='$new_endplan_date' WHERE email='$subemail'");
$recdate=gmdate('Y-m-d H:i:s');
$q = "INSERT INTO com_gest(recdate,userid,type,recvalue) VALUES ('$recdate','$userid','Plan Date','$subday')";
mysql_query($q, $this->connection);
}
if($subamt >0){
$query = mysql_query("UPDATE user SET balance=balance+".$subamt." WHERE email='$subemail'");
$recdate=gmdate('Y-m-d H:i:s');
$q = "INSERT INTO com_gest(recdate,userid,type,recvalue) VALUES '$recdate','$userid','Balance','$subamt')";
mysql_query($q, $this->connection);
}
$query = mysql_query("UPDATE user SET server='$serv' WHERE email='$subemail'");
return 0;
}
In your code u can't get directly this
$endplan_date=$dbarray['end_plan_date'];
for fetching this variable u have to use while loop like
while($dbarray = mysql_fetch_array($result);) {
$endplan_date=$dbarray['end_plan_date'];
}
There was an issue when calling this function.
I'm having trouble trying to set a variable then use it in a select statement. I keep getting a "general error" and can't figure out what I'm doing wrong. Any input would be appreciate. I'm trying to set a variable using subqueries with named parameters.
$query = $dbh->prepare("Set #available = (SELECT SUM(payments) FROM payments WHERE customer = :customer) - (SELECT SUM(charges) FROM charges WHERE customer = :customer); SELECT #available");
$query->bindParam(":customer", $customer);
$query->execute();
If you want to use MySQL user variables, for some reason, you don't need multi-queries support. They (user variables) live as long as you session (connection) is open. Therefore you can do something like this
$customer = 1;
try {
$db = new PDO('mysql:host=localhost;dbname=dbname;charset=UTF8', 'user', 'password');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$sql = "SET #available = (SELECT SUM(payments) FROM payments WHERE customer = ?) -
(SELECT SUM(charges) FROM charges WHERE customer = ?)";
$query = $db->prepare($sql);
$query->execute(array($customer, $customer));
$query = $db->prepare("SELECT #available");
$query->execute();
$result = $query->fetchAll(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
echo "Exeption: " .$e->getMessage();
$result = false;
}
$query = null;
$db = null;
var_dump($result);
Sample output:
array(1) {
[0]=>
array(1) {
["#available"]=>
string(6) "100.00"
}
}
PDO doesn't seem to offer any formalised support for multi-queries (but some support does seem to be available), but mysqli does. Neither offer support for prepared multiple statements, though.
You can use mysqli like this:
$mysqli = new mysqli('servername', 'username', 'password', 'dbname');
$query = sprintf("Set #available = (SELECT SUM(payments) FROM payments WHERE customer = %1$s)" .
" - (SELECT SUM(charges) FROM charges WHERE customer = %1$s);".
" SELECT #available",
$mysqli->real_escape_string($customer) );
// Following code lifted from PHP Manual.
// This code will read multiple results, if they're available.
// Your query only returns one.
/* execute multi query */
if ($mysqli->multi_query($query)) {
do {
/* store first result set */
if ($result = $mysqli->store_result()) {
while ($row = $result->fetch_row()) {
printf("%s\n", $row[0]);
}
$result->free();
}
/* print divider */
if ($mysqli->more_results()) {
printf("-----------------\n");
}
} while ($mysqli->next_result());
}
The reference is here