from clause
英 [frəm klɔːz]
美 [frəm klɔːz]
网络 FROM子句; From 子句
双语例句
- Root, which is equivalent to a FROM clause.
相当于一个FROM子句。 - This no longer works if you use arbitrary tables and fields to specify the from clause or the result clause dynamically, though, because the result set types cannot be determined at programming time.
但是，如果使用任意数量的表和字段动态地指定from子句或result子句，就不能这样了，因为在编程时无法确定结果集类型。 - For all tables listed in a FROM clause, there can be, at most, one access or join request with the'FIRST'attribute.
对于FROM子句中列出的所有表，最多有一个访问或计划可以带有“FIRST”属性。 - Sometimes, it makes sense to omit the FROM clause from a query.
有时，从查询中忽略FROM子句很有意义。 - Temporal queries involving business time are also easy to write& and you need only include FOR BUSINESS_TIME in the FROM clause.
涉及业务时间的时态查询也很容易编写，您仅需要在FROM子句中包含FORBUSINESSTIME。 - The FROM clause is made up of the tables from the join objects from the dimensions, facts, and cube model.
FROM子句由来自维、事实和多维数据集模型的联结对象的表组成。 - Without their work in Starburst, inline SQL PL and data-change-operations in the FROM clause could not exist.
如果没有他们在Starburst的工作，就不存在FROM子句中的内联SQLPL和数据更改操作。 - Because the data for the query is provided programmatically, the query does not need a FROM clause.
因为查询的数据是编程方式提供的，所以查询不需要FROM子句。 - The attribute FIRST in the ACCESS guideline element specifies that the table CUSTACC must appear as the outermost table when the tables in the FROM clause are joined.
ACCESS准则元素中的属性FIRST指定在连接FROM子句中的表时，表CUSTACC必须作为最外层的表出现。 - Derived tables in the FROM clause of queries
查询的FROM子句中的派生表 - A more efficient technique is to filter database rows by placing conditions in the WHERE clause, which is evaluated immediately after the tables are specified within the FROM clause.
更有效的方法是通过在WHERE子句中放置条件来过滤数据库行，在FROM子句中指定表之后会立即对WHERE子句求值。 - If you click on a table in the FROM clause, it will highlight related columns in the SELECT and WHERE clauses.
如果单击FROM子句中的表，它会突出显示SELECT和WHERE子句中相关的列。 - In addition, AS correlation specifications in the FROM clause can declare temporary names for columns within the query.
此外，FROM子句中的AS相关性规范可以为查询中的列声明临时名称。 - It's usual to explicitly set the model to use as the source for the query, unless otherwise specified with a FROM clause in the RDQL itself.
通常直接设置模型用作查询的源，除非在RDQL中使用FROM子句指定了其他的源。 - The idea is, on a descriptive level, to build in the FROM clause a temporary table that consists of the data to be imported before calling any of the spatial functions.
其思想是，在一个描述性级别上，在FROM子句中建立一个临时表，这个表由在调用任何空间函数之前导入的数据组成。 - Code join predicates first, followed by local predicates ( predicates on a single table) in the same order as the named tables appear in the FROM clause.
首先编码联接谓词，然后是本地谓词（单个表上的谓词），顺序与FROM子句中的已命名表的顺序相同。 - The usage of SQL Table Functions allows you to push procedural logic into the FROM clause of a query.
SQL表函数的使用使您可以将过程性逻辑放入到查询的FROM子句中。 - Figure 4 shows an example of how Ctrl-space ( or your preferred default keystroke for content assistance) provides appropriate table names for the FROM clause within JDBC.
图4展示了一个示例，该示例演示了Ctrl-空格（或您偏爱的内容助手默认快捷键）提供了JDBC中的FROM子句的适当表名。 - The table-reference variable is then used for the SQL Select statement FROM clause.
然后，表引用变量被用于SQLSelect语句FROM子句。 - Usage of data-change-operations in the FROM clause allows retrieval of generated columns such as IDs, as well as the retrieval of data to be deleted or updated.
在FROM子句中对数据更新操作的使用允许对生成的列（例如ID）的检索，以及对要被删除或更新的数据的检索。 - Join predicates need to be specified in the FROM clause.
需要在FROM子句中指定联结谓词。 - Inserts can be done into views, if the query specification defining the view is updateable and has only one table in the from clause.
如果定义视图的查询说明是可更新的而且from子句中只有一个表，则可以插入到视图中。 - Query cannot be updated because the from clause is not a single simple table name.
不能更新查询，因为from子句不是单一的简单表名。 - For more information about lateral derived tables, see from clause.
有关侧向派生表的详细信息，请参见from子句。 - The file specified in the from clause is empty.
from子句中指定的文件是空文件。 - If more than one table is in the from clause, must be qualified by the table name.
如果from子句中有多个表，则必须用表名限定。 - The cons include complex SQL ( sub-query in the from clause and union all).
缺点是SQL（from子句和unionall子查询）太复杂。 - The previous restrictions apply to any subqueries in the from clause of the view, just as they apply to the view itself.
上述限制适用于视图的from子句中的任何子查询，就像其应用于视图本身一样。 - Insert or update operations that are based on a self-join follow the order in the from clause.
基于自联接的插入和更新操作遵循from子句中的顺序。 - For locking hints in the from clause, the with keyword is always optional.
对于from子句中的锁提示，with关键字始终是可选的。