Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft FabricReturns true if a geometry instance is well-formed, based on its Open Geospatial Consortium (OGC) type. Returns false if a geometry instance is not well-formed....
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric Returns 1 if a geometry instance completely contains another geometry instance. Returns 0 if it does not. Syntax Copy .STContains ( other_geometry ) Arguments other_geometry Is...
SQL Server return type: bitCLR return type: SqlBooleanRemarksThis method always returns null if the spatial reference IDs (SRIDs) of the geometry instances do not match.ExamplesThe following example uses STIntersects() to determine if two geometry instances intersect each other....
SQL Server return type:geometry CLR return type:SqlGeometry Remarks STBuffer()calculates a buffer likeBufferWithTolerance, specifyingtolerance= distance * .001 andrelative=false. Whendistance> 0 then either aPolygonorMultiPolygoninstance is returned. ...
SQL Server return type:float CLR return type:SqlDouble Remarks STDistance()always returns null if the spatial reference IDs (SRIDs) of thegeometryinstances do not match. Examples DECLARE @g geometry; DECLARE @h geometry; SET @g = geometry::STGeomFromText('POLYGON((0 0, 2 0, 2 2, 0 2...
SQL Server type: float CLR type: SqlDouble Remarks The value of this property will be null if the geometry instance is a point. This property is read-only. Examples The following example creates a Point instance and uses STY to retrieve the Y-coordinate of the instance. SQL Copy DECLARE...
1Database db =DatabaseFactory.CreateDatabase();2DbCommand dbCmd = db.GetSqlStringCommand("SELECT GeomCol1 FROM SpatialTable WHERE id=4");3using(IDataReader reader =db.ExecuteReader(dbCmd))4{5if(reader.Read())6{7SqlGeometry o = reader[0]asSqlGeometry;89}10}1112SqlGeometry geo = SqlGeo...
在pgAdmin中,再次选择nyc数据库并打开SQL查询工具。将下面的SQL代码粘贴到pgAdmin SQL Editor窗口中(删除默认情况下可能存在的任何文本),然后执行。 CREATETABLEgeometries(namevarchar,geomgeometry);INSERTINTOgeometriesVALUES('Point','POINT(0 0)'),('Linestring','LINESTRING(0 0, 1 1, 2 1, 2 2)'),('...
进行以下任意操作时,会创建特定的 SQL 函数和类型: 在Oracle 或PostgreSQL 数据库中创建地理数据库。 在Oracle 或PostgreSQL 数据库中安装 ST_Geometry 空间数据类型。 使用createSQLiteDatabase ArcPy 函数创建 SQLite 数据库,并指定 ST_Geometry 空间数据类型。 在Oracle 和PostgreSQL 数据库中,ST_Geo...
显然,这些大家都应该很熟悉,都是SQL中的关键字,使用SQL功能类,可以降低在开发中的出错率。 查询功能的实现 定义功能类并提供获取查询的 SQL 语句的方法。 @SelectProvider:生成查询用的 SQL 语句注解。 type 属性:生成 SQL 语句功能类对象 method 属性:指定调用方法 ...