All About SQL Functions - Scalar Functions (Page 4 of 6 )
Scalar functions work against one value and return one value based on the input. Aggregate functions work on a bunch of data and return one result. I understand if you fell asleep during that; I did just writing it.
Here is a table of scalar functions.
Function Name | What it does |
UCASE(c) | Changes a field to Uppercase |
LCASE(c) | Changes a field to lowercase |
MID(c,start[,end]) | Extracts characters from a text field |
LEN(c) | Returns the length of a text field |
INSTR(c,char) | Returns the position of a character in a field |
LEFT(c,number_of_char) | Returns the left part of text |
RIGHT(c,number_of_char) | Returns the right part of text |
ROUND(c,decimals) | Rounds a numeric field to a number of decimals |
MOD(x,y) | Gives the remainder in division |
NOW() | Returns the present system date |
FORMAT(c,format) | Formats a field |
DATEDIFF(d,date1,date2) | For date calculation |
UCASE(c)
If you want make all the characters of a selected item uppercase, you can use the UCASE function, like so:
Select UCASE('darth ladel') from Employees;
This will return the following: DARTH LADEL
LCASE(c)
Likewise, you may also wish to force all of the characters to be lowercase.
Select LCASE('Darth Brooks') from Employees;
Next: Mid(c,start[,end] >>
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