Update SQL value in Ajax and PHP. ['id']; // this has the value MSN89 $sql = 'UPDATE User SET cards='$id. JQuery/Ajax SQL live update via PHP help. Updating Data into MySQL Database Using PHP. Data can be updated into MySQL tables by executing SQL UPDATE statement through PHP function mysql_query. SQL Server 2005 Accessing SQL Server Databases with PHP. An appropriate Transact-SQL query (such as an UPDATE. Com/en-us/sqlserver/ SQL. Keep in mind when dealing with PHP & MySQL that sending a null-terminated string to a MySQL query can be misleading if you use echo($sql) in PHP because the null terminator may not be visible. For example (this assumes connection is already made), $string1 = 'mystring 0'; $string2 = 'mystring'; $query1 = 'SELECT * FROM table WHERE mystring='.$string1.' ' $query2 = 'SELECT * FROM table WHERE mystring='.$string2.' ' $result1 = mysql_query($query1); $result2 = mysql_query($query2); //$result1 IS NOT EQUAL TO $result2 but will not provide an error //but printing these queries to the screen will provide the same result echo($result1); echo($result2); Not knowing this could lead to some mind-numbing troubleshooting when dealing with any strings with a null terminator. So now you know!:). Dunno if is it a bug but when you are working with replications servers and work with multiple databases queries if you don't select the database it will only insert,update,delete into the master and bypass the slave, I think it its because it doesn't insert the sql on the binary log so the work around its to just call mysql_select_db MYSQL: 5.0.51a-log PHP: 5.2.6 Example. For those of you whom spent hours bashing your brains against the keyboard wondering why your non-English characters are output as question marks. Try the following: Simply run the query 'set names 'utf8' ' against the MySQL DB and your output should appear correct. One way to reduce the dangers of queries like the dlete command above that dletes the whole DB is to use limits wherever possible. If you have a routine that is only deisnged to delete 1 record, add 'LIMIT 1' to the end of the command. This way you'll only lose one record if someone does something stupid. You should also check all input, especially if it is sent using GET. Make sure that $_GET['id'] is not NULL or == ', is a number that is positive, not 0 (generally, I know this doesn't apply to some table types, but it applies to the default) and is within the valid range for that field. Just don't trust ANY data that is sent to your script. Tengo una pagina como la que esta arriba. Se supone que si le doy new, en la parte superiori a la izq, me deje crear un usuario nuevo con su nombre, telefono, email, etc. Si le doy al zafacon me debe borrar la linea completa de mi pagina y mi base de datos. Si le doy al lapiz sale algo asi: En la pantalla me deje editar lo que ya tengo escrito. Al cambiar algo y darle al boton de Actualizar no se actualiza en mi base de dato y tampoco en la pagina. Como podria resolver este problema?? Estos son los codigos que tengo para darle update. $name = $_POST['name']; $tel = $_POST['telefono']; $email = $_POST['email']; $dia = $_POST['Dia']; $mes = $_POST['Mes']; > $ultcel = $_POST['UltimoCelebrado']; $sql = 'UPDATE user '. 'SET name = '. 'telefono = '. 'WHERE UltimoCelebrado = '. ''; En vez de WHERE UltimoCelebrado='.$ult.' ' deberia ser: WHERE UltimoCelebrado='.$ultcel.' ' que es la variable que declaraste para recibir $_POST['UltimoCelebrado'].
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