In general, Oracle accepts all forms of expressions in all parts of all SQL statements.
True
False
You may use two consecutive minus signs in arithmetic expressions to indicate the subtraction of a negative value.
ALL scalar functions in Oracle return null when given a null argument
It is a good practice to use ROWID as a table's primary key.
The VARCHAR datatype specifies a variable-length character string.
You use comments in a SQL statement to pass hints to the Oracle optimizer
Oracle treats zero-length character strings as nulls.
During a hierarchical query, Oracle always processes the WHERE clause before the CONNECT BY clause.
In Oracle SQL, all set operators have equal precedence
In Oracle, the select list appears after the SELECT keyword and before the FROM clause.