In PostgreSQL is it possible to join between table and function?

I have a table named Cars and a function named PartsPerCar

there is no direct link between carid and partid. the link is though 3 tables in the middle. I do have a function called PartsPerCar which gets carid (it goves via the tables in the middle) and give back all the partid related to carid.

for example : if I choose carid=125 I can call PartsPerCar(125) and get:

part id    part name
10          Wheel A
12          Wheel D
13          Glass F

what I want to get eventualy is to get a list of all cars and all it's parts.

something like:

  Car ID ,   Part ID , Part Name
    1            15    engine A
    1            17    engine C
           .
           .
           .
    125         10     Wheel A
    125         12     Wheel D
    125         13     Glass F

the thing is that there is nothing to do join on.

I know I can do:

select PartsPerCar(carid)
from Cars

but it doesn't help me so much as I need the partid to use with the WHERE statement. In this way I can't do that.

Best How To :

Your table uses a carid value to retrieve the corresponding part_ids from function PartsPerCar() which returns a set of rows, a so-called table function. In sub-section 5 (keep on reading) we see that

Table functions appearing in FROM can also be preceded by the key word LATERAL, but for functions the key word is optional; the function's arguments can contain references to columns provided by preceding FROM items in any case.

You have all that you need to perform your query:

SELECT carid, partid, part_name
FROM cars, PartsPerCar(carid) AS carparts;

This creates a CROSS JOIN between the table cars and the set of records from the function PartsPerCar() but since the output of the latter is constrained by the parameter taken from the former it effectively works like a join condition.

How to join result of a Group by Query to another table

sql,tsql

You have mistake here from tblUsers u,a.Login_Name try to move this piece of code a.Login_Name to select Select u.User_Id, a.Login_Name from tblUsers u inner join (SELECT s.Login_Name Login_Name, COUNT(s.s1CIDNumber)as abc FROM [dbSuppHousing].[dbo].[tblSurvey] s group by s.Login_Name) a on u.Login_Name=a.Login_Name ...

Convert AWK command to sqlite query

sql,awk,sqlite3

SQLite is an embedded database, i.e., it is designed to be used together with a 'real' programming language. It might be possible to import that log file into a database file, but the whole point of having a database is to store the data, which is neither a direct goal...

How to select next row after select in SQL Server?

sql,sql-server

The query can be written as: ; WITH Base AS ( SELECT *, ROW_NUMBER() OVER (ORDER BY Shift_Date) RN FROM #Table1 ) , WithC AS ( SELECT * FROM Base WHERE Shift2 = 'C' ) SELECT * FROM WithC UNION SELECT WithCNext.* FROM WithC C LEFT JOIN Base WithCNext ON...

T-SQL Ordering a Recursive Query - Parent/Child Structure

sql,tsql,recursion,order,hierarchy

The easiest way would be to pad the keys to a fixed length. e.g. 038,007 will be ordered before 038,012 But the padding length would have to be safe for the largest taskid. Although you could keep your path trimmed for readability and create an extra padded field for sorting....

Purging Database - Count purged/not-purged tables

mysql,sql,sql-server,database,stored-procedures

The only way to do this is to manually run a count(*) on all of your tables filtering on the particular date field. The reason for this is because one table might have a column "CreatedDate" that you need to check if it's >30 days old, while another might have...

Inner Join 3 tables pl/sql

mysql,sql

The issue is that you are using the alias C where you should not, with the count function. This: C.Count(C.column6) should be: Count(C.column6) and the same change applies in the order by clause (which might be counting the wrong column - should it not be column6?): order by C.count(column5) desc...

Retrieve data from one table and insert into another table

sql,asp.net,sql-server

INSERT INTO tbl2 ( Name ,parentId ) SELECT DISTINCT manager ,0 FROM tbl1 WHERE manager NOT IN ( SELECT employee FROM tbl1 ) INSERT INTO tbl2 SELECT DISTINCT employee ,0 FROM tbl1 UPDATE tbl2 SET parentid = parent.id FROM tbl2 INNER JOIN tbl1 ON tbl2.Name = tbl1.employee INNER JOIN tbl2...

Query how often an event occurred at a given time

mysql,sql

This could be done using user defined variable which is faster as already mentioned in the previous answer. This needs creating incremental variable for each group depending on some ordering. And from the given data set its user and date. Here how you can achieve it select user, date, purchase_count...

Title search in SQL With replacement of noice words [on hold]

sql,sql-server,sql-server-2008

I think you want something like this: DECLARE @nw TABLE ( sn INT, [key] VARCHAR(100) ) INSERT INTO @nw VALUES ( 1, 'and' ), ( 2, 'on' ), ( 3, 'of' ), ( 4, 'the' ), ( 5, 'view' ) DECLARE @s VARCHAR(100) = 'view This of is the Man';...

Pull information from SQL database and getting login errors

php,sql,database

change $username = "'rylshiel_order"; to $username = "rylshiel_order"; and you should be through. You are passing on an extra single quote here. ...

timestamp SQL to Excel

php,mysql,sql,excel

The ###### is shown in MS Excel when the data in a cell is too long for the column width.... the data inside the cell is still correct, as you can see if you select one of those cells and look at the value displayed in the cell content bar...

Postgresql Update JDBC

java,postgresql,jdbc

You shouldn't build SQL by putting your variables directly via string concatenation. What happens here is that with 11, your SQL becomes: set last=11 Which is valid SQL (using 11 as a integer literal), while with xx it becomes: set last=xx There are no quotes, so the SQL means you're...

Entity Framework code-first: querying a view with no primary key

sql,oracle,entity-framework,view,ef-code-first

It's not possible in Entity Framework to have Entities without primary key. Try to get a possible unique key from the views, combining columns, ... to create a unique primary key. If is not possible there is a workaround, if is only a queryable view, with out need to do...

SQL: overcoming no ORDER BY in nested query

sql,sqlite

Use a join instead: SELECT a, b FROM t JOIN (SELECT DISTINCT date FROM t ORDER BY date DESC LIMIT 2) tt on t.date = tt.date; ...

Using Sum in If in Mysql

mysql,sql,select,sum

Using least would be much easier: SELECT LEAST(SUM(my_field), 86400) FROM my_table ...

MySQL: Select several rows based on several keys on a given column

mysql,sql,database

If you are looking to find the records matching with both the criteria here is a way of doing it select `item_id` FROM `item_meta` where ( `meta_key` = 'category' and `meta_value` = 'Bungalow' ) or ( `meta_key` = 'location' AND `meta_value` = 'Lagos' ) group by `item_id` having count(*)=2 ...

SQL only one cell from column can have X value

mysql,sql

Have a separate table with one row that contains the mainOfferName of the row that you want. Then query as: select yt.*, (nt.mainOfferName is not null) as valueFlag from yourtable yt left join newtable nt on yt.mainOfferName = nt.mainOfferName; When you want to change the value, change the value in...

Is there a better way to write this query involving a self select?

sql,postgresql,join,aggregate-functions

Query The query is not as simple as it looks at first. The shortest query string does not necessarily yield best performance. This should be as fast as it gets, being as short as possible for that: SELECT p.username, COALESCE(w.ct, 0) AS won, COALESCE(l.ct, 0) AS lost FROM ( SELECT...

SQL Group By multiple categories

php,mysql,sql,mysqli

Just include a case statement for the group by expression: SELECT (CASE WHEN Categories.name like 'Cat3%' THEN 'Cat3' ELSE Categories.name END) as name, sum(locations.name = 'loc 1' ) as Location1, sum(locations.name = 'loc 2') as Location2, sum(locations.name = 'loc 3') as Location3, count(*) as total FROM ... GROUP BY (CASE...

Get unique row by single column where duplicates exist

sql,sql-server

SELECT MIN(date),thread_id FROM messages GROUP BY thread_id HAVING COUNT(thread_id) > 1 ...

Looping distinct values from one table through another without a join

sql,sql-server,tsql,while-loop

So you want all distinct records from table1 paired with all records in table2? That is a cross join: select * from (select distinct * from table1) t1 cross join table2; Or do you want them related by date? Then inner-join: select * from (select distinct * from table1) t1...

How do I find records in one table that do exist in another but based on a date?

mysql,sql

select d.`name` from z_dealer d where (select count(*) from z_order o WHERE o.promo_code = d.promo_code AND o.date_ordered > '2015-01-01') = 0 ...

need help specifying potentially reserved words as strings in postgres query

postgresql

For string literals, you should you single quote instead of double quote: UPDATE rv_template_fields SET view = 'display_type_1' WHERE rv_template_fields.view = 'display_type_2' Double quotes are for quoting identifiers of fields and relations, like, for instance view, so that you could write also: UPDATE rv_template_fields SET "view" = 'display_type_1' WHERE "view"...

How can I create missing date records for each employee based off a limited calendar?

mysql,sql,tsql

Create a table that contains all the possible dates in the range, @alldates Then insert your missing records with something like this: Query INSERT INTO dbo.timeclock SELECT id ,d.punchtime ,'no time entered' FROM ( SELECT DATE ,id FROM @alldates d CROSS JOIN ( SELECT DISTINCT id FROM dbo.timeclock )...

Fastest way to add a grouping column which divides the result per 4 rows

sql,sql-server,tsql,sql-server-2012

Try this: SELECT col, (ROW_NUMBER() OVER (ORDER BY col) - 1) / 4 + 1 AS grp FROM mytable grp is equal to 1 for the first four rows, equal to 2 for the next four, equal to 3 for the next four, etc. Demo here Alternatively, the following can...

Take thousand value in SQL

sql,sql-server

SELECT CONVERT(INT,YourColumn) % 1000 FROM dbo.YourTable ...

Select Statement on Two different views

sql

Yes, You can use two different view in SELECT query. You have to JOIN them, if them have matched column in each other. Just treat two different views as like two different tables when using in SELECT Clause. SELECT vw1.a, vw2.b FROM View1 vw1 INNER JOIN View2 vw2 ON vw1.id...

Recursive Lag Column Calculation in SQL

sql,sql-server,recursion

Edit In hindsight, this problem is a running partitioned maximum over Column1 * 2. It can be done as simply as SELECT Id, Column1, Model, Product, MAX(Column1 * 2) OVER (Partition BY Model, Product Order BY ID ASC) AS Column2 FROM Table1; Fiddle Original Answer Here's a way to do...

Foreign key in C#

c#,sql,sql-server,database

You want create relationship in two table Refer this link http://www.c-sharpcorner.com/Blogs/5608/create-a-relationship-between-two-dataset-tables.aspx...

PostgreSQL: trigger to call function with parameters

postgresql

A trigger procedure is created with the CREATE FUNCTION command, declaring it as a function with no arguments and a return type of trigger. You can use the arguments passed to the trigger function via TG_ARGV, e.g. TG_TABLE_NAME - the name of the table that caused the trigger invocation....

SQL varchar variable inserts question mark

sql,sql-server-2012

there is un recognizable character in your string that is giving that ?. Delete the value and retype. see my above screen shot...

Select all none null values from all columns in a table

mysql,sql

select @variable will just return you a value of variable. You need to use some dynamic SQL I believe. Maybe smth like exec('select ' + @colname + ' from ' etc) will work for you (at least it will work in MS SQL server).

for-loop add columns using SQL in MS Access

sql,ms-access,table,for-loop,iteration

I have tested your code, I do not see any issues except for the fact, your For statement is a bit off and that you needed to set the db object. Try this code. Sub toto() Dim db As Database, i As Integer Set db = CurrentDb For i =...

The column name “FirstName” specified in the PIVOT operator conflicts with the existing column name in the PIVOT argument

sql,sql-server,sql-server-2008

You could use CTE to define your null values and then pivot the data something like this: ;WITH t AS ( SELECT isnull(jan, 0) AS jan ,isnull(feb, 0) AS feb ,sum(data) AS amount FROM your_table --change this to match your table name GROUP BY jan,feb ) SELECT * FROM (...

Error while trying to insert data using plpgsql

postgresql,timestamp,plpgsql

CURRENT_TIME is a reserved word (and a special function), you cannot use it as variable name. You don't need a variable here to begin with: CREATE OR REPLACE FUNCTION test_func(OUT pid bigint) AS $func$ BEGIN INSERT INTO "TEST"(created) VALUES (now()) RETURNING id INTO pid; END $func$ LANGUAGE plpgsql; now() is...

Matplotlib: Plot the result of an SQL query

python,sql,matplotlib,plot

Take this for a starter code : import numpy as np import matplotlib.pyplot as plt from sqlalchemy import create_engine import _mssql fig = plt.figure() ax = fig.add_subplot(111) engine = create_engine('mssql+pymssql://**:****@127.0.0.1:1433/AffectV_Test') connection = engine.connect() result = connection.execute('SELECT Campaign_id, SUM(Count) AS Total_Count FROM Impressions GROUP BY Campaign_id') ## the data data =...

Can someone explain to me how this statement is an exclude?

sql,sql-server,tsql

I can explain... a query that's very close to yours. Let me alter it to: SELECT * FROM [table].[dbo].[one] AS t1 LEFT JOIN [table].[dbo].[one] AS t2 ON (t1.ColumnX = t2.ColumnX AND t2.columnY = 1) WHERE t2.tableID IS NULL This query retrieves all rows from t1, then checks to see if...

Add 1 to datediff result if time pass 14:30 or 2:30 PM

sql,ms-access,ms-access-2007

Could be: SELECT reservations.customerid, DateDiff("d",reservations.checkin_date, Date()) + Abs(DateDiff("s", #14:30#, Time()) > 0)AS Due_nights FROM reservations ...

SQL Multiple LIKE Statements

sql,sql-server,tsql,variables,like

WITH CTE AS ( SELECT VALUE FROM ( VALUES ('B79'), ('BB1'), ('BB10'), ('BB11'), ('BB12'), ('BB18'), ('BB2'), ('BB3'), ('BB4'), ('BB5'), ('BB6'), ('BB8'), ('BB9'), ('BB94'), ('BD1'), ('BD10'), ('BD11'), ('BD12'), ('BD13'), ('BD14'), ('BD15'), ('BD16'), ('BD17'), ('BD18'), ('BD19'), ('BD2'), ('BD20'), ('BD21'), ('BD22'), ('BD3'), ('BD4'), ('BD5'), ('BD6') ) V(VALUE) ) SELECT * FROM tbl_ClientFile...

Merging two tables into new table by ID and date

sql,sql-server,phpmyadmin

You can use a SELECT statement when inserting into a table. What I would do here is write a select statement that pulls all of the columns you need first. You will have to do a full outer join (simulated by a union of left and right joins) because some...

SQL Customized search with special characters

sql,sql-server,sql-server-2008

Here is my attempt using Jeff Moden's DelimitedSplit8k to split the comma-separated values. First, here is the splitter function (check the article for updates of the script): CREATE FUNCTION [dbo].[DelimitedSplit8K]( @pString VARCHAR(8000), @pDelimiter CHAR(1) ) RETURNS TABLE WITH SCHEMABINDING AS RETURN WITH E1(N) AS ( SELECT 1 UNION ALL SELECT...

SQL Repeated Condition in Two Tables

sql,variables,coding-style,condition

you can achieve it like this DECLARE @AccountId int; @AccountID=20; DELETE FROM Table_A WHERE FunctionId IN (Select FunctionId FROM Table_B WHERE [email protected]); DELETE FROM Table_B WHERE [email protected]; ...

mysql_real_escape_string creates \ in server only not in local

php,sql

Your server has magic quotes enabled and your local server not. Remove it with the following sentence set_magic_quotes_runtime(0) As this function is deprecated and it will be deleted in PHP 7.0, I recommend you to change your php.ini with the following sentencies: magic_quotes_gpc = Off magic_quotes_runtime = Off If you...

oracle sql error Case When Then Else

sql,oracle,oracle11g

Perhaps this is what you want? If there are rows in SecondTable, then do the second EXISTS: SELECT * FROM FirstTable WHERE RowProcessed = 'N' AND (NOT EXISTS (SELECT 1 from SecondTable) OR EXISTS (SELECT 1 FROM SecondTable WHERE FirstTable.Key = SecondTable.Key and SecondTable.RowProcessed = 'Y')) AND OtherConditions ...

left join table, find both null and match value

sql,sql-server,join

Try FULL OUTER JOIN. This is the sqlfiddle. It will produce the op you are expecting SQLFiddle select t1.years, t1.numOfppl, t2.years, t2.numOfppl from t1 full outer join t2 on t1.years=t2.years ...

Retrieve Values As Column

mysql,sql

If types are fixed (just IMPRESSION and CLICK), you could use a query like this: SELECT headline, SUM(tracking_type='IMPRESSION') AS impressions, SUM(tracking_type='CLICK') AS clicks FROM tracking GROUP BY headline ...

Default the year based on month value

sql,sql-server

SQL Server is correct in what it's doing as you are requesting an additional row to be returned which if ran now 2015-06-22 would return "2016" Your distinct only works on the first select you've done so these are your options: 1) Use cte's with distincts with subq1 (syear, eyear,...

Select count Columns group by No

sql,sql-server

this will work. you have to provide separate case statement to each condition SQLFIDDLE for the same SQLFIDDLE SELECT EMP_NO, sum(CASE WHEN Emp_Shift = 'AL' THEN 1 ELSE 0 END) AS COUNT_AL, sum(CASE WHEN Emp_Shift = 'S' THEN 1 ELSE 0 END) AS COUNT_S, sum(CASE WHEN Emp_Shift = 'H' THEN...

Prepared statements: Using unnamed and unnumbered question mark style positional placeholders

postgresql

Prepared statements are used to speed up the repeated execution of the same query with different arguments. If your aim is to insert many rows at once it is better to execute regular insert query, which will be faster than the prepared insert. However, if you insisted on this solution,...