What are Oracle string functions?

The Oracle String functions manipulate the character strings more effectively. The DECOMPOSE() function returns a Unicode string from the given string. DUMP() The DUMP() function returns the string datatype code, length in bytes and some internal representation of the given string.

What is the string function Instr used for?

The INSTR function searches a character string for a specified substring, and returns the character position in that string where an occurrence of that a substring ends, based on a count of substring occurrences.

How do you declare a string in Oracle?

To work with strings in your PL/SQL programs, you declare variables to hold the string values. To declare a string variable, you must select from one of the many string datatypes Oracle Database offers, including CHAR, NCHAR, VARCHAR2, NVARCHAR2, CLOB, and NCLOB.

What is the string function is used for explain with an example?

See for example Concatenation below. The most basic example of a string function is the length(string) function. This function returns the length of a string literal….CharAt.

Definition	charAt(string,integer) returns character.
Equivalent	See substring of length 1 character.

What is string function Instr used for explain with an example?

Answer: The INSTR functions search string for substring . The function returns an integer indicating the position of the character in string that is the first character of this occurrence. INSTR calculates strings using characters as defined by the input character set.

What is the TRIM function in Oracle?

Description. The Oracle/PLSQL TRIM function removes all specified characters either from the beginning or the end of a string.

Syntax. The function will remove trim_character from the front of string1.

Returns. The TRIM function returns a string value.

Note.

Applies To

Example.

What is the SUBSTR function in Oracle PLSQL?

Description. The Oracle/PLSQL SUBSTR functions allows you to extract a substring from a string.

Syntax. The source string.

Returns. The SUBSTR function returns a string value.

Note. If start_position is 0,then the SUBSTR function treats start_position as 1 (ie: the first position in the string).

Applies To

Example.

What does the Translate function do in Oracle?

Description. The Oracle/PLSQL TRANSLATE function replaces a sequence of characters in a string with another set of characters.

Syntax. The string to replace a sequence of characters with another set of characters.

Returns. The TRANSLATE function returns a string value.

Applies To

Example.

How do you find string in SQL?

How to Find a String within a String in SQL Server. In SQL Server, you can use the T-SQL CHARINDEX() function or the PATINDEX() function to find a string within another string.