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单选题
What is true about joining tables through an equijoin?（）
A
You can join a maximum of two tables through an equijoin.
B
You can join a maximum of two columns through an equijoin.
C
You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.
D
To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.
E
You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.
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更多 “单选题What is true about joining tables through an equijoin?（）A You can join a maximum of two tables through an equijoin.B You can join a maximum of two columns through an equijoin.C You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.D To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.E You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.” 相关考题
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What is true about joining tables through an equijoin? ()
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In which three cases would you use the USING clause?()
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多选题Which two statements are true regarding the USING clause in table joins?（）AIt can be used to join a maximum of three tablesBIt can be used to restrict the number of columns used in a NATURAL joinCIt can be used to access data from tables through equijoins as well as nonequijoinsDIt can be used to join tables that have columns with the same name and compatible data types
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