在Visual FoxPro中，执行查询Query2.qpr的正确命令是____________。

Methods to query content-based video include ____________________, ____________________, ____________________, ____________________, ____________________ and Concept query (query by keyword).

In Access2016, the data source of the query can be (). A: Table B: Query C: Table, query and report D: Table and query

The following () does not belong to the operation query. A: Parameter query B: Generate table query C: Update query D: Delete query

在命令窗口输入（）命令可以建立查询。 A: MODIFY QUERY B: EDIT QUERY C: CREATE QUERY D: TYPE QUERY

SQL的含义是哪个？ A: Standard query language B: structured query language C: speedy query language D: super query language

SQL是哪三个单词的缩写 A: Selected Query Langue B: procedured query language C: Standard Query Language D: Structured Query Language

在关系数据库中，SQL是指（ ）。 A: Selected Query Language B: Procedured Query Language C: Structured Query Language D: Standard Query Language

Which two statements are true regarding the execution of the correlated sub-queries?Choose two.() A: The nested query executes after the outer query returns the row. B: The nested query executes first and then the outer query executes C: The outer query executes only once for the result returned by the inner query. D: Each row returned by the outer query is evaluated for the results returned by the inner query

关系数据库标准语言SQL是哪一项的缩写形式？（） A: AStructured Query Language B: BStandard Query Language C: CSelected Query Language D: DSeeking Query Language