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Updating multiple tables in mssql

updating multiple tables in mssql-21

For all other cases you cannot use PDO prepared statements at all: neither an identifier, or a comma-separated list, or a part of a quoted string literal or whatever else arbitrary query part cannot be bound using a prepared statement.

Note that you can get this advantage only when emulation mode is turned off. There is absolutely nothing special in these queries. Either for Note that this method is memory-friendly, as it doesn't load all the resulting rows in the memory but delivers them one by one (though keep in mind this issue).Thus, for the average LAMP developer, this point is rather insignificant, and to him, PDO is just a more complicated version of familiar function. PDO abstracts not only a database API, but also basic operations that otherwise have to be repeated hundreds of times in every application, making your code extremely Note that although PDO is the best out of native db drivers, for a modern web-application consider to use an ORM with a Query Builder, or any other higher level abstraction library, with only occasional fallback to vanilla PDO.Good ORMs are Doctrine, Eloquent, Red Bean, and Yii:: AR. SQL is a good example of a PDO wrapper with many additional features.Having a query with placeholders, you have to prepare it, using the As you can see, for the positional placeholders, you have to supply a regular array with values, while for the named placeholders, it has to be an associative array, where keys have to match the placeholder names in the query.You cannot mix positional and named placeholders in the same query.As a result, half of PDO's features remain in obscurity and are almost never used by PHP developers, who, as a result, are constantly trying to reinvent the wheel which Unlike those, this tutorial is written by someone who has used PDO for many years, dug through it, and answered thousands questions on Stack Overflow (the sole gold PDO badge bearer). The abstraction, however, is two-fold: one is widely known but less significant, while another is obscure but of most importance.

Following the mission of this site, this article will disprove various delusions and bad practices, while showing the right way instead. Everyone knows that PDO offers unified interface to access many different databases.

Either way, it's good to know the basic tools first.

So, let's begin: PDO has a fancy connection method called DSN.

In fact, the list is overwhelmingly short: only string and numeric literals can be bound.

So you can tell that as long as your data can be represented in the query as a numeric or a quoted string literal - it can be bound.

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