The LEFT() function in MySQL is used to extract a specified number of characters from the left side of a given string. It uses its second argument to decide, how many characters it should return.
Syntax:
LEFT (str, len)
Parameter: This function accepts two parameters as mentioned above and described below :
- str: The given string from whose left side a number of characters are to be extracted.
- len: The number of characters to extract. If this parameter is larger than the number of characters in the string, this function will return the actual string.
Returns: It returns a number of characters from a string (starting from left).
Example 1:
Applying LEFT() Function to a given string.
SELECT LEFT("geeksforgeeks", 4) AS Left_Str;
Output:
Example 2:
Applying Left() Function to a number.
SELECT LEFT(12345678, 4) AS Left_Num;
Output:
Example 3:
Applying LEFT() Function to a given string when len > characters in the string.
SELECT LEFT("geeksforgeeks", 20) AS Left_Str;
Output :
Example 4:
Applying LEFT() Function to a column in a table.
Table : Student_Details
1610110 |
Aniket |
anike1001@gmail.com |
1610111 |
Nitin |
nitin5438@yahoo.com |
1610112 |
Sayantan |
sayan6975@gmail.com |
1610113 |
Sanjay |
sanjay5064@tmail.com |
SELECT Student_Name, LEFT(Student_Email, 9) AS Email_Name
FROM Student_Details;
Output:
Aniket |
anike1001 |
Nitin |
nitin5438 |
Sayantan |
sayan6975 |
Sanjay |
sanjay506 |
Last Updated :
03 Oct, 2023
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