What is the difference between running SQL SGBD and in an intermediate language (PHP, Java, C#)?

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Hello, I need valuable information that I do not know how to justify could help me in the following scenario?

PHP: When executing the SQL(UPDATE) statement by PHP and returning to the list of products I just updated and clicking again on the same product gets the old value example: DISABLED, if I return again the list the product is shown as active. (being updated after a second time);

T-SQL: Already if I am on the screen and run the UPDATE directly by SGBD, and return to the list of products and click again on the product will show that it is ACTIVE as I wish.

Note the list: Product list and product screen are in an Iframe and do not store cache as well.

Hugs,

php

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In fact what was happening was that after I gave an UPDATE in PHP, there was a last update right after, and the system was the last. Or by overwriting my own.

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