The use of table names is simpler, but using table identifiers is a more powerful mechanism because it can refer to a derived quantifier, such as an 'xmlexists' predicate.
使用表名比较简单，但是使用表标识符的功能更加强大，因为它可以指代一个派生的限定符，比如一个 “xmlexists” 谓词。
The use of table names is simpler, but using table identifiers is a more powerful mechanism because it can refer to a derived quantifier, such as an 'xmlexists' predicate.
使用表名比较简单，但是使用表标识符的功能更加强大，因为它可以指代一个派生的限定符，比如一个 “xmlexists” 谓词。
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