Question: What is reverse function in SQL?

How do you reverse in SQL?

The REVERSE() function accepts a string argument and returns the reverse order of that string. The following shows the syntax of the REVERSE() function. The input_string is a character string expression. Otherwise, you must use CAST to explicitly convert the input string to VARCHAR .

How do I reverse a string in SQL Server?

This function in SQL Server is used to reverse the stated string and return the output.

  1. Features :
  2. Syntax : REVERSE(string)
  3. Parameter : This method accepts only one parameter as given below :
  4. Returns : It returns the stated string in the reversed form.
  5. Example-1 : …
  6. Output : Gfg.
  7. Example-2 : …
  8. Output : skeeGrofskeeg.

What is left () in SQL?

In SQL Server (Transact-SQL), the LEFT function allows you to extract a substring from a string, starting from the left-most character.

How do you reverse a function?

How to Invert a Function to Find Its Inverse

  1. Switch f(x) and x. When you switch f(x) and x, you get. (Note: To make the notation less clumsy, you can rewrite f(x) as y and then switch x and y.)
  2. Change the new f(x) to its proper name — f1(x). The equation then becomes.
  3. Solve for the inverse. This step has three parts:
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How do I reverse a string?

Different ways to find the reverse of a string in the C

  1. Reverse a string using the strrev() function.
  2. Reverse a string without using the library function.
  3. Reverse a string using the recursion function.
  4. Reverse a string using for loop.
  5. Reverse a string using while loop.
  6. Reverse a string using pointers.

How can I reverse a string in SQL Server without reverse function?

Reverse String In SQL Server Without REVERSE Function

  1. CREATE function StringReverse(@inputstring varchar(max))
  2. returns varchar(max)
  3. AS.
  4. BEGIN.
  5. DECLARE @i int,
  6. @Result varchar(max)
  7. SET @Result=”
  8. SET @i = 1.

What is replace in SQL?

Replace in SQL is a built-in function that allows you to replace all the incidents of a substring within a specified string with a new substring. … The basic syntax of replace in SQL is: REPLACE(String, Old_substring, New_substring);

How do you uppercase in SQL?

If you want to display a string in uppercase, use the SQL UPPER() function. This function takes only one argument: the string column that you want to convert to uppercase.

What is the purpose of trigger?

Triggers are used to maintain the referential integrity of data by changing the data in a systematic fashion. Each trigger is attached to a single, specified table in the database. Triggers can be viewed as similar to stored procedures in that both consist of procedural logic that is stored at the database level.

How do I get the last 3 characters of a string in SQL?

SQL Server RIGHT() Function

  1. Extract 3 characters from a string (starting from right): SELECT RIGHT(‘SQL Tutorial’, 3) AS ExtractString;
  2. Extract 5 characters from the text in the “CustomerName” column (starting from right): …
  3. Extract 100 characters from a string (starting from right):
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What is Initcap in SQL?

The INITCAP function converts the first letter of each word in a string to uppercase, and converts any remaining characters in each word to lowercase. Words are delimited by white space characters, or by characters that are not alphanumeric.

How do I write a concatenate query in SQL?

SQL Server CONCAT() Function

  1. Add two strings together: SELECT CONCAT(‘W3Schools’, ‘.com’);
  2. Add 3 strings together: SELECT CONCAT(‘SQL’, ‘ is’, ‘ fun!’ );
  3. Add strings together (separate each string with a space character): SELECT CONCAT(‘SQL’, ‘ ‘, ‘is’, ‘ ‘, ‘fun!’ );
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