5. Report examples

First Example

Let’s suppose we have some generic information about all Caribbean Countries: the country name, the governmental form, the population, the names of all cities and also the languages spoken in each Caribbean country (source is MySQL sample database world).
We could show first a list of all countries names and to offer the report user the option to go in more detail for each country. In EspressoViews this could be build up like this:

You may already see that this report uses three SQL entities .

The first query is Caribbean Countries (CountryCode, CountryName, Population, GovernmentForm) transmits the column Country Code to its two children: Languages Spoken in the Caribbean (CountryCode, Language, Percentage) and Caribbean Cities (CountryCode, CityName, District, Population).

Both children can apply the transmitted column name CountryCode:

Below is the full report definition:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<ROOT>
<SQLQueryDefinition>
	<SQLQueryLabel>Caribbean Countries</SQLQueryLabel> 
	<SQLQuery>
	select distinct Code as CountryCode, a.Name as CountryName, 
        a.Population,GovernmentForm
	from country a
	where region='Caribbean' 
	order by Population desc;
	</SQLQuery>
	<TransmittedConditionColumns>CountryCode</TransmittedConditionColumns>
	<ResultColumns>not: CountryCode,language</ResultColumns>
</SQLQueryDefinition>

<SQLQueryDefinition suppressDisplayIfNoData="true">
	<SQLQueryLabel>Languages Spoken in the Caribbean</SQLQueryLabel>
	<SuperSQLQuery>Caribbean Countries</SuperSQLQuery>
	<SQLQuery>
	select 
	distinct percentage, Code as CountryCode, a.Name as CountryName,
 	a.Population, c.Language, GovernmentForm 
	from country a,  countrylanguage c
	where region='Caribbean' 
	and percentage>0.00
	and c.CountryCode =a.code
	order by 1
	</SQLQuery>
	<ResultColumns>Language, percentage</ResultColumns>
	<TransmittedConditionColumns>Language</TransmittedConditionColumns>
</SQLQueryDefinition>


<SQLQueryDefinition suppressDisplayIfNoData="true">
	<SQLQueryLabel>Caribbean Cities</SQLQueryLabel>
	<SuperSQLQuery>Caribbean Countries</SuperSQLQuery>
	<SQLQuery>
	select ID, Name as CityName, CountryCode, District, Population 
        from city a
	</SQLQuery>
	<ResultColumns>not: CountryCode,id</ResultColumns>
</SQLQueryDefinition>
</ROOT>

Second Example

You could also say, I want to see first all the Caribbean Languages spoken and then unfold the Countries, where this languages are spoken and then, for each country I want to see a list of its cities. Then you might generate this view:

The first query Languages Spoken in the Caribbean (Language, Speakers) retrieves a the total number of Caribbean speakers per language and transmits the column name Language to the children query Caribbean Country (CountryCode ,Language, Percentage, CountryName, Population, GovernmentForm). This entity transmits the column name CountryCode to its child entity CaribbeanCities (CityID, CountryCode, CityName, District, Population).

Below is the full report definition:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<ROOT>
<SQLQueryDefinition>
	<SQLQueryLabel>Languages Spoken in the Caribbean</SQLQueryLabel>
	<SQLQuery>
	select Language, sum(Population) as Speakers 
        from countrylanguage a,country b
	where a.percentage>0.00
	and a.CountryCode =b.Code 
	and b.region='Caribbean'
	group by language
	order by 2 desc
	</SQLQuery>
	<TransmittedConditionColumns>Language</TransmittedConditionColumns>
</SQLQueryDefinition>

<SQLQueryDefinition suppressDisplayIfNoData="true">
	<SQLQueryLabel>Caribbean Countries</SQLQueryLabel> 
	<SuperSQLQuery>Languages Spoken in the Caribbean</SuperSQLQuery>
	<SQLQuery>
	select 
	distinct percentage, Code as CountryCode, a.Name as CountryName, 
        a.Population, c.Language, GovernmentForm
	from country a,  countrylanguage c
	where region='Caribbean' 
	and percentage>0.00
	and c.CountryCode =a.code
	order by 1 desc;
	</SQLQuery>
	<TransmittedConditionColumns>CountryCode</TransmittedConditionColumns>
	<ResultColumns>not: CountryCode,language</ResultColumns>
</SQLQueryDefinition>

<SQLQueryDefinition suppressDisplayIfNoData="true">
	<SQLQueryLabel>Caribbean Cities</SQLQueryLabel>
	<SuperSQLQuery>Caribbean Countries</SuperSQLQuery>
	<SQLQuery>
	select ID as CityID, Name as CityName, CountryCode, District, Population 
        from city a
	</SQLQuery>
	<ResultColumns>not: CountryCode,CityID</ResultColumns>
</SQLQueryDefinition>
</ROOT>