sql-view

I have this table named people with two dates on MySQL: | Name | start_date | end_date | | John | 2007-03-01 | 2009-10-12 | | Mike | 2001-06-06 | 2010-12-01 | I want to create a view that lets me search by activity year, being activity year any year between the start_date and the end_date . So, I'd like to get a field with a sequence of years, like this: | Name | activity_years | | John | 2007,2008,2009 | | Mike | 2001,2002,2003,2004,2005,2006,2007,2008,2009,2010 | I've tried some approaches, but I can't get it. Since I want to create a view, I have to do it everything inside a SELECT

Is it possible to grab data from two tables (that have the same fields) into one view. Basically, so the view sees the data as if it was one table. Yes, using a UNION - CREATE VIEW vw_combined AS SELECT * FROM TABLE1 UNION ALL SELECT * FROM TABLE2 ...requires that there be the same number of columns, and the data types match at each position. ..preferrably, using a JOIN: CREATE VIEW vw_combined AS SELECT * FROM TABLE1 t1 JOIN TABLE2 t2 ON t2.col = t1.col But I want to warn against depending on views - if not materialized, they are only prepared SQL statements. There's no performance benefit,

I'm attempting to select the column names of a view in a similar way as selecting from information_schema.columns . I can't seem to find a way to do this. Has anyone else done this before or know if it is even possible? information_schema.columns.Table_name (at least under Sql Server 2000) includes views, so just use SELECT * FROM information_schema.columns WHERE table_name = 'VIEW_NAME' Try this: SELECT * FROM sys.views This gives you the views as such - if you need the columns, use this: SELECT * FROM sys.columns WHERE object_id = OBJECT_ID('dbo.YourViewNameHere') Not sure how you can do it

I have inserted a definition for a view in $template_dir/sql/$someTableName.sql file. (create or replace view) so every time I run syncdb , the db views are created. Can I create in models.py a python class which accesses that view? Is it better practice to just use python's raw sql functionality instead? ---EDIT--- Another problem I have is that the view doesn't have a primary key, but django seems to be assuming there will be one because I get an error caught an exception while rendering: (1054, "Unknown column 'appName_currentleagues.id' in 'field list'") But I don't have such a member

I want to create view in MySQL using a subquery CREATE OR REPLACE VIEW `V_TASK_TRANSFER` (`REF_ID`, `DATE_CREATE`, `DATE_TRX`, `ACCOUNT_NO`, `TO_ACCOUNT_NO`, `TO_NAME`, `CURRENCY_CODE`, `AMOUNT`, `TASK_TYPE`, `NAME_E`, `NAME_I`, `REF_NO`, `EXECUTION_TYPE`, `REVIEW_COUNT`, `REVIEW_NEED`, `APPROVE_COUNT`, `APPROVE_NEED`, `TRX_COUNT_SUCCESS`, `TRX_COUNT_FAIL`, `TRX_COUNT_ALL`, `STATUS_TF`, `USER_ID` ) AS SELECT REF_ID, DATE_CREATE, DATE_TRX, ACCOUNT_NO, TO_ACCOUNT_NO, TO_NAME, CURRENCY_CODE, AMOUNT, TASK_TYPE, NAME_E, NAME_I, REF_NO, EXECUTION_TYPE, REVIEW_COUNT, REVIEW_NEED, APPROVE_COUNT,

I have the same question as #1895500 , but with PostgreSQL not MySQL. How can I define a view that has a calculated field, for example: (mytable.col1 * 2) AS times_two ... and create another calculated field that's based on the first one: (times_two * 2) AS times_four ...? Depending on how heavy the formla is, you could use a subquery: select inner.*, times_two * 2 from (select mycol * 2 as times_two from table) sub Or rewrite the computation: select mycol * 2, mycol * 2 * 2 from table Use this statement CREATE VIEW view_name as SELECT column_name*2 as new_col1 , column_name*4 as new_col2 from