MySQL Questions asked in MNC

Install antivirus and configure the operating system’s firewall. Never use the MySQL Server as the UNIX root user. Change the root username and password Restrict or disable remote access. When using MySQL, it’s essential to stay vigilant about security to protect your data and infrastructure. Here are some common security alerts to be aware of: … Read more

To get current date, use the following syntax: SELECT CURRENT_DATE(); To get the current date in MySQL, you can use the CURDATE() function. Here’s an example: SELECT CURDATE(); This will return the current date in the format ‘YYYY-MM-DD’.

The “i_am_a_dummy flag” enables the MySQL engine to refuse any UPDATE or DELETE statement to execute if the WHERE clause is not present. Hence it can save the programmer from deleting the entire table my mistake if he does not use WHERE clause. The “i_am_a_dummy” flag in MySQL is a compilation flag used during MySQL … Read more

Mysql_connect: It opens a new connection to the database. Every time you need to open and close the database connection, depending on the request. Opens page whenever it is loaded. Mysql_pconnect: In Mysql_pconnect, “p” stands for persistent connection, so it opens the persistent connection. The database connection cannot be closed. It is more useful if … Read more

CHAR and VARCHAR have differed in storage and retrieval. CHAR column length is fixed, while VARCHAR length is variable. The maximum no. of character CHAR data types can hold is 255 characters, while VARCHAR can hold up to 4000 characters. CHAR is 50% faster than VARCHAR. CHAR uses static memory allocation, while VARCHAR uses dynamic … Read more