table的结果返回通过return next实现,所以需要在存储过程中每返回一条记录的时候就需要return next一次,不可以完全依赖最后的return create or replace function public.sf_get_polyline_time_seq(in_platnumber text, in_time text) --in_time '2018-02-21' returns table( id text, polyline text, timestamps...
在pg中,广泛的使用了表函数代替视图,返回集合有两种定义,setof和table。他们的区别在于table明确定义了字段名和类型,如下: CREATEFUNCTIONevents_by_type_1(text)RETURNSTABLE(idbigint, nametext)AS$$SELECTid, nameFROMeventsWHEREtype=$1; $$ LANGUAGE SQL STABLE; 注:对于返回select into或其它非直接SQL结果的...
本文将介绍如何使用 PostgreSQL 存储过程实现将轨迹点数据按照时间序列转换为一条轨迹序列的操作。具体任务是将每辆车的轨迹点数据按照时间形成一条轨迹序列，每200个轨迹点组成为一条线。文章内容将分为工作要求、数据形式、任务分解三部分进行阐述。工作要求包括原始数据为轨迹点数据，数据包含车辆编号、记录...
postgresql PL/pgSQL return setof和TABLE的区别 在pg中,广泛的使用了表函数代替视图,返回集合有两种定义,setof和table。他们的区别在于table明确定义了字段名和类型,如下: CREATE FUNCTION events_by_type_1(text) RETURNS TABLE(id bigint, name text) AS $$ SELECT id, name FROM events WHERE type = $1...
Bad performance doing a DataTable.Select() base address + relative address in HttpClient... what is full address? Base64 to tiff Best approach for launching an application (GUI) by a Windows Service Best code practice - multiple same name class names in different namespaces Best CSV file read...
Adding all the columns to table without adding one by one Adding Carriage Return and Line Feeds to a text box Adding date to filename in report subscription Adding Group Emails on subscription on ssrs adding multiple textboxes into one cell Adding percentage symbol Adding spaces in front of te...
Method 2 – Return Another Cell Value Using the VLOOKUP Function Consider a dataset of someFruits. We have 3 columns:Fruits,ID, andPrice. We will search for specific fruit prices from this table. Steps: Enter the following formula in cellG5. ...
The LAYERS table (sde_layers in SQL Server and PostgreSQL) does not exist.SE_FILE_IO_ERROR (-79)An error occurred when creating or writing to an output file.SE_BLOB_SIZE_TOO_LARGE (-80)An attempt was made to store a BLOB that exceeds the maximum allowable size of the ArcSDE server ...
The INDEX Function: This function gets values in a list or table based on location. The syntax of theINDEX functionis as follows. =INDEX (array, row_num, [col_num], [area_num]) array:Range of cells, or an array constant. row_num:The row position in the reference. ...
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