Ví dụ về việc sử dụng A totals query trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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You must use this expression with a Totals query.
A totals query calculates subtotals across groups of records;
For example, to summarize by group, you need to use a Totals query.
A totals query calculates subtotals across groups of records;
To calculate totals, you will often need to create a totals query.
You use a totals query to find the earliest or latest dates for records that fall into groups or categories.
The steps in this section explain how to create a totals query that calculates subtotals across groups of data.
In a totals query, you can use the Sum function(an aggregate function), to see total sales per product.
In that case, the cities become categories(you need to find the data per city),so you use a totals query.
You use a totals query to find the earliest or latest dates for records that fall into groups, such as events grouped by city.
The steps in the following sections explain how to add a Total row andhow to use a totals query to count data.
In addition, if you want to use a totals query, your data fields must include category information, such as a city or country/region field.
The Total row in a datasheet is very useful, but for more complex questions,you use a totals query.
You count data by using a totals query instead of a Total row when you need to count some or all of the records returned by a query. .
Note: You can use the DMin and DMax functions or the Min andMax functions in a calculated field expression of a totals query.
A totals query is a select query that allows you to group and summarize data, like when you want to see total sales per product.
Note: You can use the DVar and DVarP functions or the Var andVarP functions in a calculated field expression in a totals query.
Typically, you use a totals query instead of a Total row when you need to use the resulting value in another part of your database, such as a report.
Note: You can use the DStDev and DStDevP functions or the StDev andStDevP functions in a calculated field expression of a totals query.
For example, if you want to subtotal all sales by city or by quarter,you use a totals query to group your records by the category you want and then sum the sales figures.
Creates a field called AverageFreight, and then uses the DAvg function tocalculate the average freight on all orders combined in a Totals query.
For example, if you want to subtotal all sales by city or by quarter,you use a totals query to group your records by the desired category and you then sum the sales figures.
As you proceed, remember that by default, a totals query can include only the field or fields that contain your group data, such as a"categories" field, and the field that contains the data that you want to sum, such as a"sales" field.
To use this expression, you must convert your select query into a Totals query because you need to use the Total row in the design grid, and you must set the Total cell for this field to Expression.
As you proceed, remember that by default, a totals query can include only the field or fields that contain your group data, such as a"categories" field, and the field that contains the data that you want to sum, such as a"sales" field.
The steps in the following sections explain how to add a Total row,use a totals query to sum data across groups, and how to use a crosstab query that subtotals data across groups and time intervals.
For more information about usingaggregate functions and totaling the values in field and columns, see the articles Sum data by using a query, Count data by using a query, Display column totals in a datasheet using a Totals row, and Display column totals in a datasheet.
The steps in this sectionexplain how to create a basic select query and add a Total row.
The steps in this section explain how to create a totals and select queries needed to identify the total sales for each product.
You add a Total row to a query by opening your query in Datasheet view, adding the row, and then selecting the Count function or another aggregate function, such as Sum, Minimum, Maximum, or Average.