Concat Function Error: Invalid Number of Arguments

In an attempt to concatenate data from two columns (Name and Occupation), your query encounters an error when you insert additional information (brackets and the first letter of Occupation) into the CONCAT function. This error is caused by an invalid number of arguments being passed to the function.

To rectify the issue, you should use the correct syntax for the CONCAT function, which accepts only two arguments. Here's the revised query:

SELECT CONCAT(Name, SUBSTR(Occupation, 1, 1)) FROM OCCUPATIONS;

This query correctly combines the Name and the first character of Occupation, providing the desired output:

JaneS
JennyS
JuliaD

Instead of the CONCAT function, you could use the concatenation operator ||:

SELECT Name || '(' || SUBSTR(Occupation, 1, 1) || ')' FROM OCCUPATIONS;

This alternative approach provides the same output while simplifying the code.