Which three statements are true about single-row functions? (Choose three.)
A. They can be nested to any level
B. The data type returned can be different from the data type of the argument
C. They can accept only one argument
D. The argument can be a column name, variable, literal or an expression
E. They can be used only in the WHERE clause of a SELECT statement
F. They return a single result row per table
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A,B,D
ABD
BD for sure.
A is argumentative. Nested to 255 levels.
F. It returns single row per QUERY, not per TABLE.