MySQL – Page 54

CONV() – Convert Numbers Between Different Bases in MySQL

November 19, 2019May 14, 2018 by Ian

When working with MySQL, you can use the CONV() function to convert a number from one base to another. It takes three arguments; the number to convert, the original base, and the base you want to convert it to.

BIN() – Get the Binary Value of a Number in MySQL

November 19, 2019May 14, 2018 by Ian

In MySQL you can use the BIN() function to return a binary representation of a number. This function actually returns a string representation of the binary value.

How to Get the Number of Bits in a String in MySQL – BIT_LENGTH()

February 14, 2020May 14, 2018 by Ian

MySQL has a BIT_LENGTH() function that allows you to get the length of a string, measured in bits.

This function is similar to the LENGTH() function, which returns the length of a string in bytes. The same is true for the OCTET_LENGTH() function, which is a synonym for the LENGTH() function.

How to Find the ASCII Code for a given Character in MySQL

February 14, 2020May 13, 2018 by Ian

In MySQL, you can use the ASCII() function to return the ASCII code for a given character. More specifically, it returns the ASCII code for the leftmost character in a given string.

You can also use ORD(), which works the same way, except that it also supports multibyte characters.

How to Convert Uppercase Characters to Lowercase in MySQL

February 14, 2020May 11, 2018 by Ian

In MySQL, you can use the LOWER() function to convert any uppercase characters to lowercase. Alternatively, you can use the LCASE() function, which is a synonym for LOWER().

The syntax goes like this:

LOWER(str)

Or…

LCASE(str)

Where str is the string you want converted to lowercase.

How to Convert Lowercase Characters to Uppercase in MySQL

February 14, 2020May 11, 2018 by Ian

In MySQL, you can use the UPPER() function to convert any lowercase characters to uppercase. Alternatively, you can use the UCASE() function, which is a synonym for UPPER().

The syntax goes like this:

UPPER(str)

Or…

UCASE(str)

Where str is the string you want converted to uppercase.

How to Return the Left or Right Part of a String in MySQL

February 14, 2020May 11, 2018 by Ian

When working with MySQL databases, you might occasionally find yourself needing to select only a certain number of characters from the left or right of a string. In such cases, you can use the LEFT() and RIGHT() functions to do just that.

Here’s the syntax for both of these functions:

LEFT(str,len)
RIGHT(str,len)

Where str is the string that contains the substring you need to return, and len is the number of characters from the left you want returned.

How to Reverse the Order of Characters in a String in MySQL

February 14, 2020May 10, 2018 by Ian

If you ever need to reverse the order of a string value in MySQL – that is, return a string with the order of the characters reversed – the REVERSE() function is what you need.

The Easiest Way to Add Multiple Spaces to a String in MySQL – SPACE()

November 19, 2019May 10, 2018 by Ian

Occasionally when working with MySQL databases, you might find yourself needing to add multiple space characters to a string.

Maybe you need to pad a string by adding leading or trailing spaces. Or maybe you need to replace a single space within the string with many spaces. Either way, MySQL has the SPACE() function to help you.

The SPACE() function is an easy way for you to return as many space characters as you need.

How to Remove Leading and Trailing Characters in MySQL

February 14, 2020May 9, 2018 by Ian

MySQL has a TRIM() function that enables you to remove leading and/or trailing whitespace from a string.

You can also use it to remove other specified characters from either side (or both sides) of the string.

This article explains how to remove specified leading/trailing characters from the string.