Constructing a query at runtime with string concatenation operations and executing the query from that string.

learn more… | top users | synonyms

1
vote
1answer
31 views

Using Identity Insert on a linked server

We have a database hosted in Microsoft Azure and using this database connection details I have created a linked server object in SSMS on our on-premise SQL box and I can insert into it as following ...
1
vote
0answers
31 views

Performance impact in orders of magnitude with Dynamic SQL [closed]

This started as a problem debugging a SSRS performance problem where I found reports were timing out when they previously weren't. Finally I traced down the SQL the report server was submitting, and ...
1
vote
2answers
42 views

Dynamic SELECT and place result in variable columns

Edit: I use Microsoft SQL Server Management Studio, I believe it's SQL 2008R2. Sorry, new to this. I've got a complex question, at least, I think so since I can't find the answer after excessive ...
1
vote
1answer
49 views

Another Dynamically alias column question

I might be asking the same question as this, but perhaps if I ask it my way, a different solution may become obvious. I have this: DECLARE @Table1 AS TABLE( Table1ID Int Primary Key ,ColumnName ...
0
votes
1answer
40 views

I am trying to loop through my counter to create a dynamic sql query which should finally look like [closed]

I am trying to loop through my counter to create a dynamic sql query which should finally look like I am trying to use this approach to get the final query but does not seems to work declare ...
2
votes
2answers
148 views

SQL Server: Recursive dynamic SQL puzzle

I was looking at this post of trim all columns of a table. In the answer query script the column names gets concatenated without any looping operation. I simplified it to check its work flow as ...
0
votes
2answers
89 views

Write output from dynamic queries in PL/pgSQL to CSV file

PG_CMD="psql -d portal -U portal -c " PG_CMD_TP="psql -d portal -U portal -t -P format=unaligned -c " abc() { $PG_CMD " DO \$$ DECLARE srowdata record; ...
-2
votes
1answer
88 views

How to use variable value inside copy function [closed]

I want to send data to .csv file using COPY function in Postgres. But I am using anonymous block so my table name should be value of variable. COPY (SELECT cname.portal from user) To '/tmp/out.csv' ...
0
votes
1answer
36 views

dynamic postgres inside shell script not working

PG_CMD="psql -d portal -U portal -c " PG_CMD_TP="psql -d portal -U portal -t -P format=unaligned -c " abc() { $PG_CMD " DO \$$ BEGIN select * from customer; ...
0
votes
0answers
91 views

Reviewing ways to generate monthly tables using PL/SQL automatically

I am attempting to automate a set of tables that my colleagues produce monthly, using PL/SQL. The set of tables contain data about different metrics (e.g. Customer revenue, customer demographic ...
1
vote
2answers
89 views

Reset the sequence of a serial PK with dynamic SQL

How can I dynamically reference a sequence name (as below) using a combination of strings and DECLARE variables? Is the code below proper or is there another method of doing this? My goal is to do ...
1
vote
3answers
129 views

Copy table with separate sequences for serial columns

While creating a column management tool I came across the need to quickly replicate tables in PostgreSQL so I would not test new tools with non-test tables. To effectively test the new column tool ...
1
vote
3answers
68 views

Add fields to view from select (transpose fields)

I've got a table with following structure: CREATE TABLE test ( id integer, field character varying, value character varying ); field value ------ ----- field1 value1 field2 ...
0
votes
2answers
67 views

Efficiencies and pitfalls of a dynamically updated “Uber” View to streamline future code

We have a number of tables (about 40) with approximately 2500 columns between them that all have matching primary keys, but different unique columns. For various procedures and views, we'll draw on ...
2
votes
1answer
120 views

Stored procedure with dynamic sql. Is it isolation safe by default?

I would appreciate confirmation on the answer I found digging through T-SQL's documentation. I have a stored procedure that references a view twice. Once in the procedure and then a second time when ...
1
vote
2answers
452 views

Add function parameter to SQL query WHERE clause

I have a web application in java and it uses a query. I don't want to write the query into Java, so I made a function: CREATE OR REPLACE FUNCTION testFunc(inputs text) RETURNS TABLE(...) AS $$ ...
0
votes
0answers
170 views

Run a specific SQL Server job step from a stored procedure

I have a job with 5 steps that are scheduled to run after each other. I want to have a stored procedure where a user can execute the stored procedure and give the step number as a parameter. Only ...
3
votes
1answer
675 views

PostgresSQL dynamic execute with argument values in array

I'm wondering if this is possible in Postgres: Best explained using a contrived example: create or replace function test_function(filter_param1 varchar default null ...
0
votes
2answers
942 views

Dynamic Creation of Table using Stored Procedure Without a Use of OpenRowSet in SQL Server

Q.--> An alternative of OpenRowSet in SQL Server Description: I have created a procedure which uses Dynamic PIVOT to get a result. I have a table which contains column DateRange with values Jan-2014 ...
1
vote
1answer
91 views

EXECUTE within function not using index?

I have an accounts table with ~200k rows and an index for these columns: account_type_id BIGINT , member_id BIGINT , external_id VARCHAR(64) CREATE INDEX account_full_qualifiers_idx ON ...
2
votes
2answers
1k views

Check whether empty strings are present in character-type columns

I have an application that (as part of its logic) trims strings and replaces empty strings with NULL prior to insertion in the database. I guess one way to ensure that this is enforced would be to ...
1
vote
1answer
106 views

Refactoring sql for tables with similar columns but different table names

I have the task of re-factoring a SQL script that performs a lot of unions from different tables. These tables have similar information, so the script queries the same columns as in each table, except ...
2
votes
2answers
96 views

PostgreSQL and storing configs

The problem is to store and use global configs such as currency/date format etc. Since this functions are commonly called I'm concerned with the performance impact. Lets take currency as an example. ...
-2
votes
1answer
146 views

How to pass Parameters to stored procedure with input parameters from checkboxes [closed]

I have a query where i need to generate results based on checkbox selection. How do i need to pass my input parameters to the stored procedure in the where condition based on selection. Note: i may ...
1
vote
1answer
83 views

use variable to determine the name of a column in the select in postgre

I'm trying create a update for a new structure of tables from a old table, but not using functions. I'm trying create a script to it. The old table is like this: -- old table (OldTable) name| col_a | ...
0
votes
0answers
27 views

Accessing values of dymanic cloumn

I have a table which has 16 fields whose of alternate name to city. Below is my table structure: CREATE TABLE CITY_DATA_TO_CHK ( COUNTRY_CODE VARCHAR2 (100), REGION ...
2
votes
1answer
202 views

Inserting variables into another variable [closed]

I've been working on the code below. I'm trying to insert results of a declared variable into a sql statement. I've highlighted the section below that I'm talking about. What am I doing wrong here? ...
1
vote
1answer
138 views

Delete rows while updating references

Suppose I have a person table with an id and some other columns. Other tables reference the person table using ON UPDATE CASCADE. for instance: CREATE TABLE person (id int PRIMARY KEY); CREATE TABLE ...
3
votes
2answers
74 views

Removing all columns with given name

I am converting a MSSQL schema to PostgreSQL and in that schema most tables have a column called Timestamp that are of MSSQL timestamp datatype which is effectively rowversion. When inserting records ...
1
vote
1answer
113 views

UPSERT statement never completes, infinite loop?

Based on some of the stackoverflow answers I wrote the following UPSERT statement, which I think must be stuck in an infinite loop. I added a statement in there to avoid an infinite loop (as it would ...
0
votes
2answers
272 views

How to implement a dynamic string into a (prepared) sql statement?

I have some spatial datasets which are available in a open source metadata catalog software GeoNetwork and in a PostGIS database. The problem is that the student who created the database used ...
0
votes
2answers
510 views

How to use same stored procedure for different tables and avoid using dynamic sql

I have quite a few tables which contain some common columns (same name and datatype). On these columns I need to perform the same operations and I would like to do that via a stored procedure. However ...
0
votes
1answer
179 views

Update query in a trigger

I have a configuration table: Table: refdatecol - id int(11) startdatecol varchar(100) enddatecol varchar(100) datecolTable varchar(100) This table holds the user configured column names ...
3
votes
1answer
455 views

Difficulty getting sp_executesql to work

Alex Aza's comment solution here generates all names of tables with records referencing a specified input record. I would like to adapt Alex's solution into a table-valued function. I'm having trouble ...
1
vote
2answers
528 views

How to make a table name an attribute in PostgreSQL?

I have received hundreds of tables in PostgreSQL with identical structure and each containing similar data of a different day, so that the table name is the date of the data. I would like to Union ...
1
vote
0answers
91 views

Execute SQL at different server (with dynamic server name)

I'm using a settings table to configure on which servers a specific kind of data is stored, and I would like to do this as dynamic as possible without having to add the server as a linked server ...
1
vote
2answers
458 views

Dynamic UPDATE fails due to unwanted parenthesis around string in plpgsql

Using PostgreSQL 9.3.4 on Mac OSX 10.9.2 with Postgres.app. I want to apply a function to all columns in a table, specifically I want to trim white space. So far I've got this in a file test.sql: ...
1
vote
2answers
776 views

Dynamically REVOKE CONNECT FROM guest in SQL Server 2005

I wrote this simplistic script (I'm not very familiar with TSQL and dynamic SQL) to revoke all connections from guest accounts: DECLARE @database_id int, @database_name nvarchar(100); DECLARE ...
2
votes
1answer
116 views

How to create function(table_name) that returns a set of the table

I have a set of tables that share the same fields (some timestamps and users names used for version control). I need to create a function with dynamic sql that uses a table_name and a timestamp as ...
0
votes
1answer
2k views

Using dynamic column names in PostgreSQL

I am using PostgreSSQL 8.3. I want to execute this query: select COALESCE(col_fr,col,'Unknown') from my_table where id = 'abc'; Twist in the story is column name colum_fr should be generated ...
3
votes
2answers
2k views

Postgresql: Query across schemas

I have multiple schemas that I need to query across. The schemas are not know in advance for example: U111 U222 U333 I need to select across these three schemas from a specific table in each of ...
1
vote
2answers
57 views

Trunc sytax problem

If any one could help me with the syntax issues which I am facing here. sqlshipped := ' and a.ORDS_COMPLETED_DATE between ' ||shippedfrom ||' and trunc(' ...
0
votes
0answers
226 views

Partly rotated table with pivot/dynamic SQL without aggregation

Using MS SQL 2008, I have created a table that I want to display in horizontal direction instead of vertical direction. Because I do not now how many query results I will get returned I think I have ...
2
votes
2answers
11k views

How can I dynamically alias columns?

I have a table (not designed by me) which has 20 variably named columns. That is, depending on what type of record you are looking at, the applicable name of the column can change. The possible ...
1
vote
0answers
510 views

Prepared statement execution with variable number of parameters to be bound

Some stored procedures I work with need to interpolate WHERE criteria based on if procedure input parameters have been supplied. To avoid potential injection points, I'd like to utilize parameter ...
2
votes
1answer
66 views

Update various tables depending on survey answer

I've created a survey solution and it work just fine. All questions have multiple options to choose from as answer. What I would like to achieve is when a certain option is saved as an answer the ...
2
votes
1answer
780 views

Create A View Using Dynamic Sql

I'm trying to create a dynamic Database creation script. There are a lot of steps and we create this database often so the script looks something like this. DECLARE @databaseName nvarchar(100) = ...
1
vote
1answer
355 views

How to improve performance of SP with many optional filtering parameters?

I need to write many SP that have many optional filtering parameters. After reading Turgay Sahtiyan's (Senior SQL Server Premier Field Engineer at Microsoft) blog he mentions exactly the same problem ...
2
votes
0answers
122 views

plan_generation_num keeps incrementing, why?

I have a query that is executed using sp_executesql code is as follows DECLARE @rsk NVARCHAR(1) = '1', @ppCityID NVARCHAR(3); SET @ppCityID = CAST(@cityID AS NVARCHAR(3)); exec sp_executesql ...
2
votes
1answer
3k views

Are there other ways to select a dynamic list of columns?

I need to let my users specify the list of columns they want to select. So far I know two ways of accomplishing that. 1. Using refcursors CREATE OR REPLACE FUNCTION selecttestwithcolumnlist( ticker ...