--1 创建测试表并插入记录 skytf=> create table test_result1 (id integer,name varchar(32)); CREATE TABLE skytf=> create table test_result2 (id integer,name varchar(32)); CREATE TABLE skytf=> insert into test_result1 select generate_series(1,10),'a'; INSERT 0 10 skytf=> insert in...
p_sourcetext=0x2adbf08"create or replace function func_test(pi_v1 in int,pi_v2 varchar,pio_v3 inout varchar,po_v4 out int,po_v5 out varchar)\nreturns record\nas\n$$\ndeclare\nbegin\nraise notice 'pi_v1 := %,pi_v2 := %,pi_v3 :="..., p_rtable=0x0, p_joinexprs=0x0,...
牺牲了django的灵魂性,项目必须依赖postgresql。 项目中,希望实现返回select内容 后来通过bing.com查询,其实我需要的是返回表格。也是pq中的table,下面是demo CREATEORREPLACEFUNCTIONword_frequency(_max_tokensint)RETURNSTABLE( txt text ,abs_cntbigint,relative_sharenumeric)AS$func$BEGINRETURNQUERYSELECTt.txt ,t....
postgresql 函数返回结果集(zz) 2016-03-02 09:43 − pgsql function 系列之一:返回结果集---我们在编写postgresql数据库的函数(或称为存储过程)时,时常会遇到需要返回一个结果... 拿走不谢 0 13924 iBatis 调用 PostgreSQL 存储过程返回结果集 2007-11-10 01:02 − alimama_pid="mm_10785426_8251...
SQL标准中定义了CREATE FUNCTION命令。PostgreSQL的版本与之类似但不完全兼容。属性是不可移植的,不同的可用语言也是不能移植的。 对于和一些其他数据库系统的兼容性,argmode可以被写在argname之前或者之后。但只有第一种方式是兼容标准的。 对于参数默认值,SQL 标准只指定带有DEFAULT关键词的语法。带有=的语法被用在...
这是postgresql官⽅推荐的返回结果集的形式，当你查阅postgresql官⽅⽂档的时候，你会看到的就是这种形式。如果采⽤这种形式，你的function代码看起来会像这样：CREATE OR REPLACE FUNCTION function1 () RETURNS setof table1 AS $body$ DECLARE result record;BEGIN for result in select * from table1 ...
1.What is the PostgreSQL UNNEST() function? The UNNEST() function in PostgreSQL is used to expand an array into a set of rows. It takes an array as input and returns a new table where each element of the array occupies a separate row. ...
The SUM() of an empty set will return NULL, not zero. PostgreSQL SUM() function examples Let’s take some examples of using the SUM() function. We’ll use the payment table in the sample database. 1) Using PostgreSQL SUM() function in SELECT statement example The following example uses...
❮ PreviousNext ❯ SUM TheSUM()function returns the total sum of a numeric column. The following SQL statement finds the sum of thequantityfields in theorder_detailstable: Example Return the total amount of ordered items: SELECT SUM(quantity) ...
In Postgresql, the regexp_split_to_table() function is used to split the specified string into a table column using the specified POSIX regular expressions. The strings as well as the POSIX regular expression are provided to the function as an argument. This expression will act as a separator...