Which of the following SQL functions can data analysts use to clean string variables? Select all that apply. 1 point TRIM SUBSTR COUNTIF LENGTH
Question
Which of the following SQL functions can data analysts use to clean string variables? Select all that apply.
1 point
TRIM
SUBSTR
COUNTIF
LENGTH
Solution
To clean string variables in SQL, data analysts can use the following functions:
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TRIM: This function removes any leading or trailing spaces from a string.
-
SUBSTR: This function extracts a substring from a string based on a specified starting position and length.
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LENGTH: This function returns the length of a string, which can be useful for identifying and handling empty or excessively long strings.
Therefore, the correct options for cleaning string variables are TRIM, SUBSTR, and LENGTH. COUNTIF is not a valid SQL function for cleaning string variables.
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