According to the SQL standard, what is the maximum number of times UNION can be used in a single SELECT expression?
a. Dependent upon the database system.
b. There is no limit.
c. Once
d. Twice
b. There is no limit.
Computer Science & Information Technology
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Which jQuery method has the purpose of getting or setting the value of an HTML attribute?
a. attr() b. html() c. css() d. style()
Computer Science & Information Technology
Which of the following is true about a binary tree?
A. each node has at most two children B. each node has only one child C. child nodes can have multiple parents D. the root node must have only one child
Computer Science & Information Technology