~drizzle-trunk/drizzle/development

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String Functions and Operators
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additions, edits
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**(See tables with each function listed with a brief description below.)**
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.. toctree::
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   :maxdepth: 2
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   string/comparative
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   string/conversion
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   string/length 
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   string/modification
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   string/position
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   string/other
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List of string operators and descriptions by type of function:
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Comparative and regular functions
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Operator                  Description
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string and resources
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LIKE 	                  Matches a simple pattern
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NOT LIKE 	          Negation of simple pattern matching
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STRCMP() 	          Compare two strings
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NOT REGEXP 	          Negation of REGEXP
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REGEXP 	                  Returns values that match a regular expression pattern
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RLIKE 	                  Synonym for REGEXP
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Conversion and translation functions
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Operator                  Description
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ASCII() 	          Return numeric value of left-most character
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BIN() 	                  Return a string representation of the argument
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CHAR() 	                  Return the character for each integer passed
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HEX()  	                  Return a hexadecimal representation of a decimal or string value
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LOWER() 	          Return the argument in lowercase
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LCASE() 	          Synonym for LOWER()
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UCASE() 	          Synonym for UPPER()
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UNHEX() 	          Convert each pair of hexadecimal digits to a character
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UPPER() 	          Convert to uppercase
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Length and size functions
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Operator                  Description
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BIT_LENGTH() 	          Return length of argument in bits
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CHAR_LENGTH()             Return number of characters in argument
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LENGTH() 	          Return the length of a string in bytes
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OCTET_LENGTH() 	          A synonym for LENGTH()
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strings!
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Formatting and modification functions
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Operator                  Description
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CONCAT() 	          Returns a concatenated string
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TRIM() 	                  Remove leading and trailing spaces
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LTRIM() 	          Remove leading spaces
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RTRIM() 	          Remove trailing spaces
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Position functions
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Operator                  Description
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string function list
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FIELD() 	          Return the index (position) of the first argument in the sequent arguments
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FIND_IN_SET() 	          Return the index position of the first argument within the second argument
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INSTR() 	          Return the index of the first occurrence of substring
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LEFT() 	                  Return the leftmost number of characters as specified
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INSERT() 	          Insert a substring at the specified position up to the specified number of characters
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LOCATE() 	          Return the position of the first occurrence of substring
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POSITION() 	          A synonym for LOCATE()
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Other string functions
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Operator                  Description
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ELT() 	                  Return string at index number
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EXPORT_SET() 	          Return a string
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FORMAT() 	          Return a number formatted to specified number of decimal places
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LOAD_FILE() 	          Load the named file
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LPAD() 	                  Return the string argument, left-padded with the specified string
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MAKE_SET() 	          Return a set of comma-separated strings that have the corresponding bit in bits set
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MATCH 	                  Perform full-text search
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MID() 	                  Return a substring starting from the specified position
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ORD() 	                  Return character code for leftmost character of the argument
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QUOTE() 	          Escape the argument for use in an SQL statement
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REPEAT() 	          Repeat a string the specified number of times
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REPLACE() 	          Replace occurrences of a specified string
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REVERSE() 	          Reverse the characters in a string
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RIGHT() 	          Return the specified rightmost number of characters
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RPAD() 	                  Append string the specified number of times
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SOUNDEX() 	          Return a soundex string
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SUBSTR() 	          Return the substring as specified
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SUBSTRING_INDEX() 	  Return a substring from a string before the specified number of occurrences of the delimiter
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SUBSTRING() 	          Return the substring as specified
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===================     ====================================================================================================
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string function list
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