Character Functions in SQL | Oracle SQL fundamentals
Character functions accept #character inputs and can return either characters or number values as output. #SQL provides a number of different character datatypes which includes – #CHAR, #VARCHAR, #VARCHAR2, LONG, RAW, and LONG RAW. The various datatypes are categorized into three different datatypes :
VARCHAR2 – A variable-length character datatype whose data is converted by the RDBMS.
CHAR – The fixed-length datatype.
Note : When a character #function returns a character value, that value is always of type VARCHAR2 ( variable length ), with the following two exceptions: UPPER and LOWER. These functions convert to upper and to lower case, respectively, and return the CHAR values ( fixed length ) if the strings they are called on to convert are fixed-length CHAR arguments.
00:00 SQL LENGHT Function
01:00 SQL CONCAT Function
02:49 SQL INITCAP Function
03:38 SQL LOWER Function
03:48 SQL UPPER Function
04:11 SQL LPAD Function
05:15 SQL RPAD Function
05:24 SQL SUBSTR Function
06:44 SQL LTRIM Function
07:27 SQL RTRIM Function
07:45 SQL INSTR Function
13:47 SQL REPLACE Function
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