Select (TQL)

Select TQL queries allow users to obtain specific numerical, textual or polygonal information from the data in a session of a project. By adding various clauses to a selection statement, the query can be made more specific.

Composition of a Select Query

A Select TQL query always start using the SELECT statement for TQL provides a means of obtaining data of a session. The 'Select' statement is consists of the SELECT word followed by a selection type and the word WHERE. Depending on the selection type one or more clauses can be added. Clauses are separated with the AND word. All of these parts are separated by an underscore _.

An example of a TQL select statement is: SELECT_LOTSIZE_WHERE_CATEGORY_IS_SOCIAL_AND_STAKEHOLDERTYPE_IS_MUNICIPALITY. In this example, SELECT_LOTSIZE_WHERE is the statement. CATEGORY_IS_SOCIAL is the first clause, and STAKEHOLDERTYPE_IS_MUNICIPALITY is the second clause. It would return all the land area taken up with social housing, which is also owned by a municipal stakeholder.

Executing a Select Query

TQL Queries can be executed using:

• Query Tool in the Tygron Platform; For creating and testing TQL queries.
• Globals; Executed every calculation.
• Names in Excels; Used for Indicator and Panels and supports more complex queries.
• API's query endpoint; Using api/session/query/<TQLQUERY>

List of Select types

Click on the link of specific Select TQL types to see what you can do with them.

Select	Unit	Description	Fixed clause amount	Polygon based
ACTIVE	boolean	Returns whether an Item is active in this session	1	false
ATTRIBUTE	decimal	Returns the attribute value of an Item	No	false
COLOR	HEX Color	Returns the value of the Color of an Item in HEX format	1	false
DISTANCE	decimal	Returns the distance between two items	2	false
EXPENSES	valuta	Returns the sum of cost book values of a Stakeholder	1	false
FLOORSIZE	m²	Returns the total floorspace of buildings (lot size x floors)	No	true
GLOBAL	decimal	Returns a value of a Global	No	false
HEIGHT	m + datum m	Returns the average datum height of a polygon. Or the height of a specific Building	No	true
ID	Item ID	Returns the unique ID of an Item as an Integer	No	false
GRIDAVG	decimal	Returns the average grid value for the query polygons an a specified Grid	No	true
GRIDMIN	decimal	Returns the minimum grid value for the query polygons an a specified Grid	No	true
GRIDMAX	decimal	Returns the maximum grid value for the query polygons an a specified Grid	No	true
GRIDAREA	decimal	Returns the count of grid values, multiplied with the grid cell's area size, for the query polygons and a specified Grid	No	true
GRIDVOLUME	decimal	Returns the sum of grid values, multiplied with the grid cell's area size, for the query polygons and a specified Grid	No	true
GRIDSTDEV	decimal	Returns the standard deviation of grid values for the query polygons an a specified Grid	No	true
LANDPOLYGONS	polygons	Returns the query polygons	No	true
LANDSIZE	decimal	Returns the surface size of the query polygons	No	true
LENGTH	m	Returns the length of Net Lines	No	false
LEVEES	m²	Returns the total Levee surface size.	No	true
LOTPOLYGONS	polygons	Returns the intersection polygons between Buildings and the query polygons	No	true
LOTSIZE	decimal	Returns the total surface size of the intersection between Buildings and the query polygons	No	true
NAME	text	Returns the name of an Item	No	false
NET_STATE	Net state	Returns the net state of an item.	1	false
REVENUE	valuta	Returns the sum of income book values of a Stakeholder	1	false
SESSIONSTATE	Session state	Returns the current State of Session	0	false
STATE	Timestate	Returns the timestate of an item.	1	false
TARGET	decimal	Returns the (category) target of an indicator.	No	false
TOKEN	String	Returns the Session's API token	0	false
TOPFLOOR	Integer	Returns the amount of floors of the Building's section with the most amount of floors	No	false
UNITS	decimal	Returns the number of residential units, based on the buildings size per unit	No	true

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TQL

Select

Active • Attribute • Color • Distance • Expenses • Floorsize • Global • Height • ID • Gridavg • Gridmin • Gridmax • Gridvolume • Gridstdev • Landpolygons • Landsize • Length • Levees

• Lotpolygons • Lotsize • Name • Net State • Revenue • Sessionstate • State • Target • Token • Topfloor • Units

Update

Address • Area • Building • Global • Indicator • Neighborhood • Net Function • Net Line • Net Load • Panel • Terrain • Zone

Other

Update • Clause