CHAR VARCHAR2 Functions « PL SQL Data Types « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » PL SQL Data Types » CHAR VARCHAR2 Functions 
21.5.CHAR VARCHAR2 Functions
21.5.1.Useful character built-in functions
21.5.2.Compare char type value with blank space
21.5.3.Compare char type value with 'trim'
21.5.4.The most useful character specifications are
21.5.5.ASCII
21.5.6.SUBSTR
21.5.7.INSTR
21.5.8.Use the SUBSTR and INSTR at the same time.
21.5.9.REPLACE
21.5.10.TRANSLATE
21.5.11.PAD, RPAD, LPAD
21.5.12.TRIM
21.5.13.Extending your options with regular expressions
21.5.14.A Better Routine to Check Social Security Numbers
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