This section describes functions for handling and manipulating strings. In the functions below, the parameters are expressions where s should be interpreted as a string.
All functions can be used in both the data load script and in chart expressions, except for Evaluate which can only be used in the data load script.
Use the drop-down on each function to see a brief description and the syntax of each function. Click the function name in the syntax description for further details.
Capitalize() returns the string with all words in initial uppercase letters.
Chr() returns the Unicode character corresponding to the input integer.
Evaluate() finds if the input text string can be evaluated as a valid Qlik Sense expression, and if so, returns the value of the expression as a string. If the input string is not a valid expression, NULL is returned.
FindOneOf() searches a string to find the position of the occurrence of any character from a set of provided characters. The position of the first occurrence of any character from the search set is returned unless a third argument (with a value greater than 1) is supplied. If no match is found, 0 is returned.
FindOneOf(text, char_set[, count])
Hash128() returns a 128-bit hash of the combined input expression values. The result is a 22-character string.
Hash160() returns a 160-bit hash of the combined input expression values. The result is a 27-character string.
Hash256() returns a 256-bit hash of the combined input expression values. The result is a 43-character string.
Index() searches a string to find the starting position of the nth occurrence of a provided substring. An optional third argument provides the value of n, which is 1 if omitted. A negative value searches from the end of the string. The positions in the string are numbered from 1 and up.
Index (text, substring[, count])
KeepChar() returns a string consisting of the first string ,'text', less any of the characters NOT contained in the second string, "keep_chars".
Left() returns a string consisting of the first (leftmost) characters of the input string, where the number of characters is determined by the second argument.
Len() returns the length of the input string.
LevenshteinDist() returns the Levenshtein distance between two strings. It is defined as the minimum number of single-character edits (insertions, deletions, or substitutions) required to change one string into the other. The function is useful for fuzzy string comparisons.
Lower() converts all the characters in the input string to lower case.
LTrim() returns the input string trimmed of any leading spaces.
Mid() returns the part of the input string starting at the position of the character defined by the second argument, 'start', and returning the number of characters defined by the third argument, 'count'. If 'count' is omitted, the rest of the input string is returned. The first character in the input string is numbered 1.
Mid(text, start[, count])
Ord() returns the Unicode code point number of the first character of the input string.
PurgeChar() returns a string consisting of the characters contained in the input string ('text'), excluding any that appear in the second argument ('remove_chars').
Repeat() forms a string consisting of the input string repeated the number of times defined by the second argument.
Replace() returns a string after replacing all occurrences of a given substring within the input string with another substring. The function is non-recursive and works from left to right.
Replace(text, from_str, to_str)
Right() returns a string consisting of the last (right-most) characters of the input string, where the number of characters is determined by the second argument.
RTrim() returns the input string trimmed of any trailing spaces.
SubField() is used to extract substring components from a parent string field, where the original record fields consist of two or more parts separated by a delimiter.
SubField(text, delimiter[, field_no ])
SubStringCount() returns the number of occurrences of the specified substring in the input string text. If there is no match, 0 is returned.
TextBetween() returns the text in the input string that occurs between the characters specified as delimiters.
TextBetween(text, delimiter1, delimiter2[, n])
Trim() returns the input string trimmed of any leading and trailing spaces.
Upper() converts all the characters in the input string to upper case for all text characters in the expression. Numbers and symbols are ignored.