# Geometry Relations - [CONTAINS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/contains.md): Synonym for ST\_CONTAINS. Checks if the first geometry completely contains the second geometry, with no points of the second geometry outside the first. - [CROSSES](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/crosses.md): Synonym for ST\_CROSSES. Checks if two geometries cross, meaning they share some interior points but not all, and the intersection has a lower dimension. - [DISJOINT](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/disjoint.md): Synonym for ST\_DISJOINT. Checks if two geometries are disjoint, meaning they have no points in common. - [EQUALS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/equals.md): Synonym for ST\_EQUALS. Checks if two geometries are spatially equal, meaning they contain exactly the same point set. - [INTERSECTS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/intersects.md): Synonym for ST\_INTERSECTS. Checks if two geometries intersect, meaning they share at least one common point. - [OVERLAPS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/overlaps.md): Synonym for ST\_OVERLAPS. Checks if two geometries overlap, sharing some but not all points, and having the same dimension. - [ST\_CONTAINS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st-contains.md): Checks if geometry A contains geometry B. Returns 1 if B is completely inside A, 0 otherwise. - [ST\_CROSSES](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st-crosses.md): Checks if two geometries cross. Returns 1 if they intersect but one does not cover the other, and the intersection dimension is less than the maximum dimension. - [ST\_DIFFERENCE](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st_difference.md): Returns a geometry representing the difference between two geometries. The result contains points from the first geometry that are not in the second. - [ST\_DISJOINT](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st_disjoint.md): Checks if two geometries are disjoint. Returns 1 if the geometries share no points, 0 otherwise. - [ST\_DISTANCE](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st_distance.md): Calculates the shortest distance between two geometries. Returns the minimum Euclidean distance between any two points in the geometries. - [ST\_DISTANCE\_SPHERE](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st_distance_sphere.md): Calculates the spherical distance between two points or geometries. Uses a spherical earth model to determine the minimum distance in meters. - [ST\_EQUALS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st-equals.md): Returns a geometry representing the difference between two geometries. The result contains points from the first geometry that are not in the second. - [ST\_INTERSECTS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st-intersects.md): Checks if two geometries intersect. Returns 1 if the geometries share any portion of space (interior or boundary), 0 otherwise. - [ST\_LENGTH](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st_length.md): Returns the length of a linear geometry. Calculates the total length of a LineString or MultiLineString in its associated spatial reference units. - [ST\_OVERLAPS](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st-overlaps.md): Checks if two geometries overlap. Returns 1 if they share space but neither completely contains the other, and they have the same dimension. - [ST\_TOUCHES](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st-touches.md): Checks if two geometries touch. Returns 1 if they intersect only at their boundaries and not their interiors. - [ST\_WITHIN](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/st-within.md): Checks if geometry A is within geometry B. Returns 1 if A is completely inside B, 0 otherwise. This is the inverse of ST\_CONTAINS. - [TOUCHES](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/touches.md): Synonym for ST\_TOUCHES. Checks if two geometries touch at their boundaries without their interiors intersecting. - [WITHIN](https://mariadb.com/docs/server/reference/sql-statements/geometry-constructors/geometry-relations/within.md): Synonym for ST\_WITHIN. Checks if the first geometry is completely enclosed by the second geometry. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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