hi , i have three tables say city,state and road 1) city -> city_id(PK),name 2) state-> Stt_id(PK),name 3) Road-> Edge_id(PK), Admin_id(FK) where Admin_id refers to city_id and Stt_id both. This is done because the tables are too huge. say city_id contains 1,2,3 and Stt_id contains 4,5,6 now if i am inserting 1,2,3,4,5,6 in admin...
I need to update some rows of the tables and then display these rows. Is there a way to do this with one single query and avoid this 2 query ? : UPDATE table SET foo=1 WHERE boo=2 SELECT * from table WHERE ( foo=1 ) AND ( boo=2 ) ...
say I have a postgresql table with the following values: id | value ---------- 1 | 4 2 | 8 3 | 100 4 | 5 5 | 7 If I use postgresql to calculate the average, it gives me an average of 24.8 because the high value of 100 has great impact on the calculation. While in fact I would like to find an average somewhere around 6 and elimina...
I'm trying to move a simple Sinatra app over to Heroku. Migration of the Ruby app code and existing MySQL database using Taps went smoothly, but I'm getting the following Postgres error: PostgresError - ERROR: operator does not exist: text = integer LINE 1: ...d_at", "post_id" FROM "comments" WHERE ("post_id" IN (4, 17,... ...
How do I find the maximum (or minimum) of two integers in Postgres/SQL? One of the integers is not a column value. I will give an example scenario: I would like to subtract an integer from a column (in all rows), but the result should not be less than zero. So, to begin with, I have: UPDATE my_table SET my_column = my_column - 10; B...
Background MySQL Workbench can produce appealing and high-quality ERDs such as: Research What PostgreSQL ERD tools are available that meet the requirements? The following are unsuitable: dbVisualizer - Yellow squares. AquaFold - Yellow squares. SQL Developer - Coloured squares. Dia - Coloured squares. SQL Power Architect - Black a...
The first one below works, but, just wanted to see if there's a better way... If I'm trying to find all records that start with 'C' with either a flag of 2 or a status of 9, do I need to incorporate the 'C' criteria twice? i.e., "SELECT * FROM mytable WHERE name like 'C%' AND flag = 2 OR name like 'C%' AND status = 9" Or, is ther...
I thought that the query below would naturally do what I explain, but apparently not... My table looks like this: id | name | g | partner | g2 1 | John | M | Sam | M 2 | Devon | M | Mike | M 3 | Kurt | M | Susan | F 4 | Stacy | F | Bob | M 5 | Rosa | F | Rita | F I'm trying to get the id where either the g or g2 value equals 'M'......
Hi All, We're evaluating MySQL and PostgreSQL for building our indic language(using utf-8 encoding) web application which will use MySQL or PostgreSQL. One of my colleagues mentioned that MySQL had issues with i18n. I mostly come from the Oracle world and although I've played a lil with MySQL, I don't know enough to know that there are...
Hello, I am new to PostgreSQL array's. I am trying to a write a procedure to convert array-into-rows, and wanted following output: alphabet | number ---------+---------- A | 10 B | 10 C | 6 D | 9 E | 3 from following: id | alphabe...
I'm interested to find out which ORM has best support for Postgres SQL database? Does any mapper have, both, LINQ support and ability to generate model from database? ...
I am trying to develop a rails application on postgresql using a sequence to increment a field instead of a default ruby approach based on validates_uniqueness_of. This has proved challenging for a number of reasons: 1. This is a migration of an existing table, not a new table or column 2. Using parameter :default => "nextval('seq')" di...
I have installed PostgreSQL and pgAdminIII on my Ubuntu Karmic box. I am able to use pgAdminIII successfully (i.e. connect/log on), however when I try to login to the server using the same username/pwd on the command line (using psql), I get the error: psql: FATAL: Ident authentication failed for user "postgres" Does anyone now how t...
In PHPmyAdmin I can delete rows without using SQL. Is there a way to do this in PHPpgAdmin ? ...
This is a follow-up to a question I'd asked earlier which phrased this as more of a programming problem than a database problem. http://stackoverflow.com/questions/2935985/postgres-error-with-sinatra-haml-datamapper-on-heroku I believe the problem has been isolated to the storage of the ID column in Heroku's Postgres database after run...
I am looking for function in postgres that returns last inserted id into table. In MS SQL there is SCOPE_IDENTITY(). Is something same in PostgreSQL? Please, do not advise use something like this: select max(id) from table ...
I have a table with some datas. Is there a way to add a PK without erase the table ? ...
Hi guys, i need to perform a insert query for multiple rows whereby the first column is a numeric and identical value and the second values are queried from another table. something like insert into table (33, select col2 from another_table); can this be accomplished with a single statement? ...
Background Users can pick dates as shown in the following screen shot: Any starting month/day and ending month/day combinations are valid, such as: Mar 22 to Jun 22 Dec 1 to Feb 28 The second combination is difficult (I call it the "tricky date scenario") because the year for the ending month/day should come after the year for th...
Is there an utility to convert mysql query in postgresql query ? ...