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Fonctions géospatiales

# ST_WITHIN¶

Returns true if the the first geospatial object is fully contained by the second geospatial object. In other words:

• The first GEOGRAPHY object g1 is fully contained by the second GEOGRAPHY object g2.

• The first GEOMETRY object g1 is fully contained by the second GEOMETRY object g2.

Calling ST_WITHIN(g1, g2) is equivalent to calling ST_CONTAINS(g2, g1).

Although ST_COVEREDBY and ST_WITHIN might seem similar, the two functions have subtle differences. For details on the differences between « covered by » and « within », see the Dimensionally Extended 9-Intersection Model (DE-9IM).

Note

Cette fonction ne prend pas en charge l’utilisation de GeometryCollection ou de FeatureCollection comme valeurs d’entrée.

Voir aussi :

## Syntaxe¶

ST_WITHIN( <geography_expression_1> , <geography_expression_2> )

ST_WITHIN( <geometry_expression_1> , <geometry_expression_2> )

## Arguments¶

geography_expression_1

Un objet GEOGRAPHY qui n’est pas un GeometryCollection ou un FeatureCollection.

geography_expression_2

Un objet GEOGRAPHY qui n’est pas un GeometryCollection ou un FeatureCollection.

geometry_expression_1

A GEOMETRY object that is not a GeometryCollection or FeatureCollection.

geometry_expression_2

A GEOMETRY object that is not a GeometryCollection or FeatureCollection.

BOOLEAN.

## Exemples¶

### GEOGRAPHY Examples¶

Cela montre une utilisation simple de la fonction ST_WITHIN :

create table geospatial_table_01 (g1 GEOGRAPHY, g2 GEOGRAPHY);
insert into geospatial_table_01 (g1, g2) values
('POLYGON((0 0, 3 0, 3 3, 0 3, 0 0))', 'POLYGON((1 1, 2 1, 2 2, 1 2, 1 1))');
SELECT ST_WITHIN(g1, g2)
FROM geospatial_table_01;
+-------------------+
| ST_WITHIN(G1, G2) |
|-------------------|
| False             |
+-------------------+
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