creating table in php mysql with quotation

Question

I am trying to run a php mysql query through

 mysql_query("CREATE TABLE `user` (`id` NOT NULL INT,`username`  VARCHAR(30),`password`  VARCHAR(30))");

it gives me error

 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NOT NULL INT,`username`  VARCHAR(30),`password`  VARCHAR(30))'

I am new to php mysql how I can fix this syntax?

Answer 1

It should be:

mysql_query("CREATE TABLE `user` (`id` INT NOT NULL ,`username`  VARCHAR(30),`password`  VARCHAR(30))");

not:

mysql_query("CREATE TABLE `user` (`id` NOT NULL INT,`username`  VARCHAR(30),`password`  VARCHAR(30))");

By the way, don't use mysql_ functions they are deprecated, and in future versions of php they will get removed. Use mysqli_ instead, using them is almost the same.

Answer 2

From the doc :

CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name
    [(create_definition,...)]
    ...

create_definition:
    col_name column_definition
    ...

column_definition:
    data_type [NOT NULL | NULL]
      [DEFAULT default_value]
      [AUTO_INCREMENT] [UNIQUE [KEY] | [PRIMARY] KEY]
      ...

data_type:
    BIT[(length)]
    ...
  | INT[(length)] [UNSIGNED] [ZEROFILL]

In other words, INT (or any datatype definition ) should always precede NOT NULL (or NULL ) modifier . In fact, that's true for any modifiers - DEFAULT , AUTO_INCREMENT , UNIQUE and so on.

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As a sidenote, even though you're making first steps in PHP-MySQL, I'd recommend you start learning either mysqli or PDO extensions - these are a bit more sophisticated than mysql , but it's worth it.

Getting into mysql extension in 2014 will be a waste of time - it's deprecated for quite a long time already. Here's what's said on its intro page:

This extension is deprecated as of PHP 5.5.0, and is not recommended for writing new code as it will be removed in the future.