Finally, if possible, include all of the columns in the SELECT in the index, so that there is no need to access the table rows.
最后,如果可能的话,将SELECT中所有的列包括到索引当中,这样就不需要访问表中的行。
Below the table, you can select one of the text columns in the table to display the complete content.
在表下面,可以选择表中的文本列之一,显示它的完整内容。
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。
As depicted in Figure 7, select the text fields of the five data elements (marked in red circle) as the columns of table definition to extract text content of the XML elements.
如图7所示,选择作为表定义的列的5个数据元素的TEXT字段(以红圈标记),以提取xml元素的文本内容。
Table and use an AS clause to name these columns for the display with the ij tool. Because the query joins these two tables (by using an implicit inner join), you can select columns from both tables.
因为查询(通过使用隐式内连接)将两个表连接,您可以从两个表中选择列。
To demonstrate a SELECT statement, you can extract all the columns from the products table located in the bigdog schema, as shown in Listing 3.
为了演示select语句,可以提取位于bigdog模式中的products表中的所有列,如清单3所示。
Click the Customize Query TAB, and select all the columns available in the table, as shown in Figure 6.
单击CustomizeQuery标签,选择表中所有可用的列,如图6所示。
To build a pivot table in Excel, you select the data columns to be used in the pivot table, then select the PivotTable Report menu item from the data menu.
要在Excel中构建pivot表,您需要选择将用在pivot表中的数据列,然后从Data菜单选择PivotTablereport菜单项。
Select the target table (see Figure 27), and load columns for each DB2 stages.
选择目标表(参见图27),为每个DB2stage装载列。
Here, select the columns from the Employee table to be exported to the select statement.
在此,从employee表中选择要导出到select语句的列。
For table views, you can select from all the available columns, rearrange the order of those columns, and even rename the columns only for that particular view.
对于表视图,可以选择所有可用列,重新排列那些列的顺序,甚至可以仅为该特定视图重新命名列。
Where; you select the columns of interest from rows in a table or tables where certain conditions are satisfied.
您可以从一个或多个表的行中选择您感兴趣的满足特定条件的列。
There, you can select which columns are displayed in the table.
这里可以选择表中显示哪些列。
Once the table has columnset defined, the select * will hide all sparse columns, and only see the column set.
一旦表中定义了columnset列,select *语句将会隐藏所有的Sparse列,代之以这个columnset列。
Entries are stored in order of their internal representation, not necessarily the same as what you see on screen when you SELECT the columns from a table.
项目是根据内部表示的顺序存储的,并不需要与你从表中SELECT列时在屏幕上看到的一致。
The table editor allows you to select rows, columns, or individual cells and set their properties.
通过表编辑器,您可以选择行、列或单个单元格并设置它们的属性。
How to select a column from one table and two columns from another table when both the tables have no relation in T-SQL?
如何从一个表选择一列和来自另一个表的两个列当t - sql表没有关系吗?
The select statement returns information from table columns. But what if we only want to select distinct elements?
SELECT声明可返回来自数据表栏目内的信息,但当我们只需要返回那些不重复的元素时该怎么做?
Select a slowly changing dimension table and specify its key columns.
选取缓时变维度资料表,并指定其索引键资料行。
Select the table name, and the columns of data to obtain.
选取资料表名称,以及要取得的资料行。
To work around this problem, select the following columns of the selected table when you add a data form by using the Data Form Wizard: the primary column and a column that does not permit NULLs.
若要解决此问题,请在添加数据窗体时通过使用“数据窗体向导”选择所选表中的以下列:主列和不允许 NULL 的列。
To work around this problem, select the following columns of the selected table when you add a data form by using the Data Form Wizard: the primary column and a column that does not permit NULLs.
若要解决此问题,请在添加数据窗体时通过使用“数据窗体向导”选择所选表中的以下列:主列和不允许 NULL 的列。
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