Oracle Trim Both Example

[Autumn Pitz]

TRIMenables you to trim leading or trailing characters (or both) from a character string. If trim_character or trim_source is a character literal, then you must enclose it in single quotation marks.

Both trim_character and trim_source can be VARCHAR2 or any data type that can be implicitly converted to VARCHAR2. The string returned is a VARCHAR2 (NVARCHAR2) data type if trim_source is a CHAR or VARCHAR2 (NCHAR or NVARCHAR2) data type, and a CLOB if trim_source is a CLOB data type. The return string is in the same character set as trim_source.

Appendix C in Oracle Database Globalization Support Guide for the collation determination rules, which define the collation TRIM uses to compare characters from trim_character with characters from trim_source, and for the collation derivation rules, which define the collation assigned to the character return value of this function

The Oracle TRIM function is used to remove all leading or trailing characters (or both) from a character string. If trim_character or trim_source is a character literal, then it is necessary to enclose it in single quotation marks.

Using the TRIM function to remove newline characters or a carriage return can be done with Oracle. This can work if you only have a newline character or only a carriage return, as you can use the CHR function.

An approach recommended by users at Stack Overflow is the TRANSLATE function, to translate all occurrences of a string into a space, and then TRIM the string of spaces. See the examples below on how to do this.

The newline, carriage return, and tab characters are converted to spaces, and the entire result is then trimmed to ensure there is no spaces either side of the string, which is a possibility if there is a new line at the end of a string.

(Optional) Specifies where to trim characters from. Use BOTH to remove leading and trailing characters, use LEADING to remove leading characters only, and use TRAILING to remove trailing characters only. If this parameter is omitted, both leading and trailing characters are trimmed.

The TRIM function returns a VARCHAR or CHAR string. If you use the TRIM function with a SQL command, Amazon Redshift implicitly converts the results to VARCHAR. If you use the TRIM function in the SELECT list for a SQL function, Amazon Redshift does not implicitly convert the results, and you might need to perform an explicit conversion to avoid a data type mismatch error. See the CAST function and CONVERT function functions for information about explicit conversions.

TRIM removes any of the characters in trim_chars when they appear at the beginning or end of string. The following example trims the characters 'C', 'D', and 'G' when they appear at the beginning or end of VENUENAME, which is a VARCHAR column. For more information, see VENUE table.

The bitwise NAND operation equivalent to BITNOT(BITAND(expression, expression)). Arguments should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

The bitwise NOR operation equivalent to BITNOT(BITOR(expression, expression)). Arguments should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

The bitwise XNOR operation equivalent to BITNOT(BITXOR(expression, expression)). Arguments should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

Returns true if and only if the first argument has a bit set in the position specified by the second parameter. The first argument should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This method returns a boolean. The second argument is zero-indexed; the least significant bit has position 0.

The bitwise signed left shift operation. Shifts the first argument by the number of bits given by the second argument. Argument should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

If number of bits is negative, a signed right shift is performed instead. For numeric values a sign bit is used for left-padding (with negative offset). If number of bits is equal to or larger than number of bits in value all bits are pushed out from the value. For binary string arguments signed and unsigned shifts return the same results.

The bitwise signed right shift operation. Shifts the first argument by the number of bits given by the second argument. Argument should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

If number of bits is negative, a signed left shift is performed instead. For numeric values a sign bit is used for left-padding (with positive offset). If number of bits is equal to or larger than number of bits in value all bits are pushed out from the value. For binary string arguments signed and unsigned shifts return the same results.

The bitwise unsigned left shift operation. Shifts the first argument by the number of bits given by the second argument. Argument should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

If number of bits is negative, an unsigned right shift is performed instead. If number of bits is equal to or larger than number of bits in value all bits are pushed out from the value. For binary string arguments signed and unsigned shifts return the same results.

The bitwise unsigned right shift operation. Shifts the first argument by the number of bits given by the second argument. Argument should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

If number of bits is negative, an unsigned left shift is performed instead. If number of bits is equal to or larger than number of bits in value all bits are pushed out from the value. For binary string arguments signed and unsigned shifts return the same results.

The bitwise left rotation operation. Rotates the first argument by the number of bits given by the second argument. Argument should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

The bitwise right rotation operation. Rotates the first argument by the number of bits given by the second argument. Argument should have TINYINT, SMALLINT, INTEGER, BIGINT, BINARY, or BINARY VARYING data type. This function returns result of the same data type.

Returns the smallest integer value that is greater than or equal to the argument. This method returns value of the same type as argument, but with scale set to 0 and adjusted precision, if applicable.

Computes a hash value. Optional bucket argument determines the maximum returned value. This argument should be between 0 and 4294967295, default is 4294967295. Optional seed argument is combined with the given expression to return the different values for the same expression. This argument should be between 0 and 4294967295, default is 0. This method returns a long value between 0 and the specified or default bucket value inclusive.

Calling the function without parameter returns the next a pseudo random number. Calling it with an parameter seeds the session's random number generator. This method returns a double between 0 (including) and 1 (excluding).

Please note that using an index on randomly generated data will result on poor performance once there are millions of rows in a table. The reason is that the cache behavior is very bad with randomly distributed data. This is a problem for any database system.

If this function is used to encrypt a password, a random salt should be concatenated with a password and this salt and result of the function should be stored to prevent a rainbow table attack and number of iterations should be large enough to slow down a dictionary or a brute force attack.

When a numeric argument is specified, truncates it to a number of digits (to the next value closer to 0) and returns value of the same type as argument, but with adjusted precision and scale, if applicable.

This function with datetime or string argument is deprecated, use DATE_TRUNC instead. When used with a timestamp, truncates the timestamp to a date (day) value and returns a timestamp with or without time zone depending on type of the argument. When used with a date, returns a timestamp at start of this date. When used with a timestamp as string, truncates the timestamp to a date (day) value and returns a timestamp without time zone.

Compresses the data using the specified compression algorithm. Supported algorithms are: LZF (faster but lower compression; default), and DEFLATE (higher compression). Compression does not always reduce size. Very small objects and objects with little redundancy may get larger. This method returns bytes.

Combines strings. Unlike with the operator , NULL parameters are ignored, and do not cause the result to become NULL. If all parameters are NULL the result is an empty string. This method returns a string.

Combines strings with separator. If separator is NULL it is treated like an empty string. Other NULL parameters are ignored. Remaining non-NULL parameters, if any, are concatenated with the specified separator. If there are no remaining parameters the result is an empty string. This method returns a string.

Returns the difference between the sounds of two strings. The difference is calculated as a number of matched characters in the same positions in SOUNDEX representations of arguments. This method returns an int between 0 and 4 inclusive, or null if any of its parameters is null. Note that value of 0 means that strings are not similar to each other. Value of 4 means that strings are fully similar to each other (have the same SOUNDEX representation).

Inserts a additional string into the original string at a specified start position. The length specifies the number of characters that are removed at the start position in the original string. This method returns a string.

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