For example, this might happen when two ore more of the tables in the MQT have a referential integrity relationship defined and the join predicate is on their primary key - foreign key columns.
例如，当MQT中的两个或多个表定义了引用完整性关系并且联结谓词在它们自己的主键-外键列上时，就会出现这种情况。
The main grammatical unit of sports slogans is words, phrases and sentences. The non-primary sentence is quite often in the sentence patterns, and the subject-predicate sentence is relatively few.
体育标语在语法单位上主要有词、短语、句子，句型上体育标语比较常用非主谓句，主谓句相对较少，表达形式主要有陈述句和感叹句。
The main grammatical unit of sports slogans is words, phrases and sentences. The non-primary sentence is quite often in the sentence patterns, and the subject-predicate sentence is relatively few.
体育标语在语法单位上主要有词、短语、句子，句型上体育标语比较常用非主谓句，主谓句相对较少，表达形式主要有陈述句和感叹句。
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