In this mysql tutorial we'll tell you the mysql mysqli difference. The differences between the MySQL and MySQLi extensions are as follows:
1) The MySQL server driver named MySQL was introduced in PHP 2.0 and deprecated in PHP 5.5.
2) The MySQL driver doesn't support prepared statements.
3) The MySQL driver has poor security measures.
4) The MySQL driver doesn't have any stored procedures.
5) The MySQL driver comes with an extension named "ext/mysql."
6) The MySQL driver handles SQL transactions with SQL queries.

Now the MySQLi driver.
1) The MySQL server driver MySQLi was added in PHP 5.5.0.
2) The MySQL server driver MySQLi does support prepared statements.
3) It comes with enhanced security measures.
4) This driver working with your MySQL server installation supports stored procedures.
5) The MySQL server driver named MySQL comes with an extension named "ext/mysqli."
6) This driver working with your MySQL server installation supports transactions through an API channel.

Below we provide you some of the most frequent sql interview questions and answers. Those sql interview questions look like so:

Q: Does using mysqli_real_escape_string still make my database susceptible to SQL injection?
A: No, only mysql_real_escape_string does.

Q: How is SQL injection explained in simple terms? Will you make a SQL injection tutorial?
A: A SQL injection attack occurs when unverified user input is passed into a database. We'll likely refrain from making a SQL injection tutorial for now.

Q: What does the mysqli_fetch_array function do?
A: This function within your MySQL server fetches a row and returns it as an array.

Q: What does the mysqli_connect function do?
A: The mysqli_connect function lets you connect to your MySQL server installation.

Q: The mysqli extension is missing for me. What should I do?
A: This shouldn't be the case if you're running an updated version of PHP. If you have such an issue, add "extension=mysqli" to your php.ini file or uncomment it.

Q: I've just finished my mysql server installation. What do I configure?
A: Look into my.cnf in Linux or my.ini in Windows. These files hold the most important parameters for MySQL.

Q: Which is the most frequent type of sql index in MySQL Server?
A: The most frequent type of sql index in MySQL Server is a B-Tree index.

Q: MyISAM performs row level locking?
A: No, that's a common misconception.

Q: MyISAM vs InnoDB performance - which one is better and why?
A: InnoDB - all of the features that were available in MyISAM are now available in InnoDB.

Q: I want to switch MyISAM to InnoDB - what sql query should I use? Is there a sql tutorial that would help me with this?
A: Use this query - it will give you a list of MyISAM-based tables with a SQL query that you can copy-paste to update all of your MyISAM-based tables to InnoDB (replace ""sql tutorial for beginners"" with your database name):
SELECT CONCAT('ALTER TABLE ',TABLE_NAME,' ENGINE=InnoDB;') FROM information_schema.tables WHERE ENGINE='MyISAM' AND table_schema = 'sql tutorial for beginners';

Q: Is there a sql full course or any mysql tutorial that would cover mysql storage engines in more detail in all complex aspects?
A: Not that we know of, but if needed, we'll make a sql course talking about everything: sql basics, sql queries, sql vs nosql, sql for data analysis, etc.

Q: How to quickly optimize InnoDB?
A: Look into the parameters innodb_data_file_path, innodb_buffer_pool_size, innodb_log_file_size, innodb_log_buffer_size, innodb_flush_log_at_trx_commit, innodb_lock_wait_timeout and innodb_flush_method. See our video about mysql and big data for more information: [ Ссылка ]

Leave a like if you want to see an in-depth big data course or a big data tutorial to help you better understand your big data projects, and until next time. Would you want us to make a MySQL course or other in-depth MySQL tutorial? Let us know in the comment section below!

Those who are interested more about their database performance with a SQL index should watch the video we've made earlier on:
sql indexes explained: [ Ссылка ]

We've also made other videos about database performance issues, database performance tuning, and database performance testing.
One of our videos about database performance monitoring can be found here: [ Ссылка ]
A video depicting database slowness reasons and quickly explaining how to overcome database slowness can be found here: [ Ссылка ]
secure-file-priv MySQL video: [ Ссылка ]

Enjoy the video!

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