How to declare local variables in postgresql?

How to declare local variables in postgresql?

There is an almost identical, but not really answered question here.I am migrating an application from MS SQL Server to PostgreSQL. In many places in code I use local variables so I would like to go for the change that requires less work, s

Find row and column index of maximum value in a matrix [duplicate]

Find row and column index of maximum value in a matrix [duplicate]

This question already has an answer here: Get the row and column name of the minimum element of a matrix 1 answer I wish to find the maximum element-va

How to control number of decimal digits in write.table() output?

How to control number of decimal digits in write.table() output?

When working with data (e.g., in data.frame) the user can control displaying digits by usingoptions(digits=3) and listing the data.frame like this.ttf.allWhen the user needs to paste the data in Excell like thiswrite.table(ttf.all, 'clipboa

MySQL Row to Column

MySQL Row to Column

can any one help me on how can I create a query output using the row data on the source table as a header on my output. Please see below for illustration.E.G.Row Data:+-----------+----------+| colHeader | value |+-----------+----------+|

Xcode 3.2 Debug: Seeing whats in an array?

Xcode 3.2 Debug: Seeing whats in an array?

Whilst debugging in Xcode_3.1.2 I am pretty sure I could see the contents of my NSString arrays. However after upgrading to 3.2 I only see the following ...I know I can print the object in (gdb) using "po planetArray" or simply click in the

Rails 3: How to respond_with csv without having a template file?

Rails 3: How to respond_with csv without having a template file?

I have an object that has a to_csv method and I want to pass it to respond_with to render csv from my controller. My code looks like this:class Admin::ReportsController Instances of TripReport have a to_csv method.When I make a request to

Skip first line of csv while loading in hive table

Skip first line of csv while loading in hive table

Hello Friends,I created table in hive with help of following command - CREATE TABLE db.test ( fname STRING, lname STRING, age STRING, mob BIGINT ) row format delimited fields terminated BY '\t' stored AS textfile

SELECT where row value contains string MySQL

SELECT where row value contains string MySQL

How can I select a row in my MySQL DB where the value of a column contains 'XcodeDev' for example?I tried: SELECT * FROM Accounts WHERE Username LIKE '$query'But it only selects a row were the Username value is exactly the same to the query

Using the parent's DataContext (WPF - Dynamic Menu Command Binding)

Using the parent's DataContext (WPF - Dynamic Menu Command Binding)

I looked over this web and google and the solutions didn't work for me.I have a command on the ViewModel of a UserControl. Well, The usercontrol have a ItemsControl binded to a ObservableCollection. Inside the DataTemplate of the ItemsContr

How to make a JXTreeTable sort its top elements

How to make a JXTreeTable sort its top elements

I'm aware (I've looked at the sources ;) ) that sorting on JXTreeTable has been disabled.However, I would like to allow sorting on all columns based only on the values of the direct children of the root node.Say I have a structure like this

How to emulate tagged union in a database?

How to emulate tagged union in a database?

What is the best way to emulate Tagged union in databases?I'm talking about something like this:create table t1 { vehicle_id INTEGER NOT NULL REFERENCES car(id) OR motor(id) -- not valid ...}where vehicle_id would be id in car table OR mo

Problems understanding Android XML layout_weight

Problems understanding Android XML layout_weight

I really tried to, but I can't understand how Android interprets layout_weight setting...What I'm trying to achieve is a header on top with a fixed heightan input area at the bottom containing an EditText and a Buttona content part in the m

Do mysql update queries benefit from an index?

Do mysql update queries benefit from an index?

I have a table which I do mainly updates and I'm wondering if update queries would benefit from having an index on the where column and the updated column or an index on just where column? 1:Just on the where column. An index on the upda

Batch fill PDF forms from python or bash

Batch fill PDF forms from python or bash

I have a PDF form that needs to be filled out a bunch of times (it's a timesheet to be exact). Now since I don't want to do this by hand, I was looking for a way to fill them out using a python script or tools that could be used in a bash s

Greatest product of five consecutive digits in a 1000-digit number

Greatest product of five consecutive digits in a 1000-digit number

I am working through the problems on project Euler and am not too certain if my understanding of the question is correct.Problem 8 is as follows: Find the greatest product of five consecutive digits in the 1000-digit number.I have taken th

Hive External table-CSV File- Header row

Hive External table-CSV File- Header row

Below is the hive table i have created:CREATE EXTERNAL TABLE Activity ( column1 type, column2 type)ROW FORMAT DELIMITED FIELDS TERMINATED BY ','LOCATION '/exttable/';In my HDFS location /exttable, i have lot of CSV files and each CSV fil

How can I add a line between two columns using Twitter Bootstraps grid system

How can I add a line between two columns using Twitter Bootstraps grid system

Two column layout with a line in the middle. [ ] | [ ][ ] | [ ][ ] | [ ][ Left Column ] | [ Right Colu

Representing a 2D array as a 1D array [duplicate]

Representing a 2D array as a 1D array [duplicate]

Possible Duplicates: Implementing a matrix, which is more efficient - using an Array of Arrays (2D) or a 1D array? Performance of 2-dimensional array vs 1-dimensional array I was looking at one of my buddy's molecular dynamics code bases

How to remove current row from table in jQuery?

How to remove current row from table in jQuery?

I have a table in html as followstest content.......now if the same pattern continues, i want to remove a row if a remove button is clicked on that row. how do i achieve the same with jQuery? 1:Nicer:$(this).closest('tr').remove();More o

Programmatic access to detailed historical financial data

Programmatic access to detailed historical financial data

I know that Yahoo has a great API for accessing detailed financial metrics about a company documented at http://www.gummy-stuff.org/Yahoo-data.htm. Yahoo also provides historical pricing data, documented at http://code.google.com/p/yahoo-fi

Can I use a min-height for table, tr or td?

Can I use a min-height for table, tr or td?

I am trying to show some details of a receive in a table.I want that table to have a min height to show the products. So if there is only one product, the table would have at least some white space at the end. In the other hand if there are

How can I draw a bezier curve using Python's PIL?

How can I draw a bezier curve using Python's PIL?

I'm using Python's Imaging Library and I would like to draw some bezier curves.I guess I could calculate pixel by pixel but I'm hoping there is something simpler. 1:A bezier curve isn't that hard to draw yourself. Given three points A, B

How to Check if value exists in a MySQL database

How to Check if value exists in a MySQL database

Suppose I have this table:id | name | city------------------1 | n1 | c12 | n2 | c23 | n3 | c34 | n4 | c4I want to check if the value c7 is exists under the variable city or not. If the answer is 'yes' I will do something.If the

django admin: separate read-only view and change view

django admin: separate read-only view and change view

I'd like to use the django admin to produce a read-only view of an object which contains an "Edit" button which switches you to the usual change view of the same object.I know how to use the readonly attributes to produces a read-only view,

MySQL auto-store datetime for each row

MySQL auto-store datetime for each row

In MySQL, I'm sick of adding the columns dt_created and dt_modified (which are date time stamps for creation and last modified respectively) to all the tables I have in my database.Every time I INSERT or UPDATE the database, I will have to