In SQL Server, you can use the T-SQL REPLACE() function to replace all instances of a given string with another string. For example, you can replace all occurrences of a certain word with another word.
MySQL REPLACE() – Replace All Instances of a Substring with another String
The MySQL REPLACE() function enables you to replace all occurrences of a substring with another string. It allows you to do things like, replace all occurrences of one word with another word, etc.
This article demonstrates its usage.
Repeat a String Multiple Times in MySQL – REPEAT()
This article demonstrates how to repeat a string multiple times in MySQL using the REPEAT() function.
As the name suggests, the REPEAT() function can be used to repeat a string. More specifically, it allows you to specify how many times the string should be repeated.
How to Retain the Backslash when Escaping Quotes in MySQL – QUOTE()
Using a backslash to escape single quotes is a commonly used technique to ensure that the single quotes don’t interfere with MySQL‘s handling of the full string.
Single quotes are used to surround a string, so a single quote within the string itself could cause havoc if it isn’t properly escaped. Simply inserting a backslash immediately before the quote mark ensures that MySQL doesn’t terminate the string prematurely.
However, there may be occasions where you want the backslash to remain. For example, you might intend to use the string in an SQL statement, and therefore, you want it to be properly escaped first.
This is where the QUOTE() function comes in.
The MySQL QUOTE() function quotes a string to produce a result that can be used as a properly escaped data value in an SQL statement. The string is returned enclosed by single quotation marks and with each instance of backslash (\), single quote ('), ASCII NUL, and Control+Z preceded by a backslash.
3 Ways to Find the Position of a Substring within a String in MySQL
MySQL has a number of string functions that return the position of a substring within a string. More specifically, they return the position of the first occurrence within the string (or the first occurrence after a given starting point).
The functions I’m referring to are as follows:
INSTR()LOCATE()POSITION()
Below is an overview of each one.
CONV() – Convert Numbers Between Different Bases in MySQL
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
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()
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
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 Return the Unicode Value for a given Character in SQL Server – UNICODE()
One of the functions included in T-SQL is the UNICODE() function. You can use this function with SQL Server (and Azure) to return the Unicode value of a given character.
This function works similar to the ASCII() function, except that it returns the Unicode value.