dynamic-sql

Using PostgreSQL, column values from a table for 1st record are stored in a record variable. for ex: let the variable be: recordvar recordvar.columnname gives the value of the column name specified. I will define the columname in a variable: var := columnname In place of columnname if I replace with the variable i.e. recordvar.var , it is not working. Please let me know how to proceed in this situation. Following is the sample code: CREATE OR REPLACE FUNCTION getrowdata(id numeric, table_name character varying) RETURNS SETOF void AS $BODY$ DECLARE srowdata record; reqfield character varying;

I'm new to Postgres and have a database with multiple tables of the same structure. I need to select data from each table that matches certain criteria. I could do this with a bunch of UNION queries, but the number of tables I need to search can change over time, so I don't want to hard code it like that. I've been trying to develop a function that will loop through specific tables (they have a common naming convention) and return a table of records, but I'm not getting any results when I query the function. Function code is below: CREATE OR REPLACE FUNCTION public.internalid_formaltable_name

I just asked an SQL related question, and the first answer was: " This is a situation where dynamic SQL is the way to go. " As I had never heard of dynamic SQL before, I immediately searched this site and the web for what it was. Wikipedia has no article with this title. The first Google results all point to user forums where people ask more or less related questions. However, I didn't find a clear definition of what a 'dynamic SQL' is. Is it something vendor specific? I work with MySQL and I didn't find a reference in the MySQL handbook (only questions, mostly unanswered, in the MySQL user

I'm trying to switch the current database with a SQL statement. I have tried the following, but all attempts failed: USE @DatabaseName EXEC sp_sqlexec @Sql -- where @Sql = 'USE [' + @DatabaseName + ']' To add a little more detail. EDIT: I would like to perform several things on two separate database, where both are configured with a variable. Something like this: USE Database1 SELECT * FROM Table1 USE Database2 SELECT * FROM Table2 exec sp_execsql @Sql The DB change only lasts for the time to complete @sql http://blog.sqlauthority.com/2007/07/02/sql-server-2005-comparison-sp_executesql-vs

Why do I get this error Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'. when I try to use sp_executesql? Sounds like you're calling sp_executesql with a VARCHAR statement, when it needs to be NVARCHAR. e.g. This will give the error because @SQL needs to be NVARCHAR DECLARE @SQL VARCHAR(100) SET @SQL = 'SELECT TOP 1 * FROM sys.tables' EXECUTE sp_executesql @SQL So: DECLARE @SQL NVARCHAR(100) SET @SQL = 'SELECT TOP 1 * FROM sys.tables' EXECUTE sp_executesql @SQL The solution is to put an N in front of both he type and the SQL string to indicate it is a double-byte

I have a Postgres function: create function myfunction(integer, text, text, text, text, text, text) RETURNS table(id int, match text, score int, nr int, nr_extra character varying, info character varying, postcode character varying, street character varying, place character varying, country character varying, the_geom geometry) AS $$ BEGIN return query (select a.id, 'address' as match, 1 as score, a.ad_nr, a.ad_nr_extra,a.ad_info,a.ad_postcode, s.name as street, p.name place , c.name country, a.wkb_geometry as wkb_geometry from "Addresses" a left join "Streets" s on a.street_id = s.id left