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SQL - Combine two tables with different date value

Tags:

sql

mysql

I'm working on project to display stock information in a website. And i want to ask how to combine two tables in SQL.

Suppose we have Table1

stock_id     date     p_high   p_low
------------------------------------
3         2013-02-26     100      80
3         2013-02-25     100      80
3         2013-02-24     100      80
1         2013-02-24     100      80
3         2013-02-23     100      80
2         2013-02-23     100      80

And we have Table2

stock_id     date       open   high  low  close  volume
---------------------------------------------------------
3         2013-02-24     90    110    70    90     250
3         2013-02-23     90    110    70    90     250
2         2013-02-23     90    110    70    90     250
3         2013-02-22     90    110    70    90     250
3         2013-02-21     90    110    70    90     250
1         2013-02-21     90    110    70    90     250

And i want to combine the date and display all the data like this,

Update: I want to combine the date and the stock_id

stock_id     date       open   high  low  close  volume  p_high  p_low
------------------------------------------------------------------------
3         2013-02-26                                       100    80
3         2013-02-25                                       100    80
3         2013-02-24     90    110    70    90     250     100    80
3         2013-02-23     90    110    70    90     250     100    80
3         2013-02-22     90    110    70    90     250
3         2013-02-21     90    110    70    90     250

Thank you for your help.

like image 514
kaitosenpai Avatar asked Apr 01 '13 04:04

kaitosenpai


2 Answers

Query: SQLFIDDLEExample

SELECT a.stock_id,
       a.date,
       a.open,
       a.high,
       a.low,
       a.close,
       a.volume,
       a.p_high,
       a.p_low
FROM (
SELECT t1.stock_id,
       t1.date,
       t2.open,
       t2.high,
       t2.low,
       t2.close,
       t2.volume,
       t1.p_high,
       t1.p_low
FROM table1 t1
LEFT JOIN table2 t2 ON t1.date = t2.date
UNION
SELECT t2.stock_id,
       t2.date,
       t2.open,
       t2.high,
       t2.low,
       t2.close,
       t2.volume,
       t1.p_high,
       t1.p_low
FROM table1 t1
RIGHT JOIN table2 t2 ON t1.date = t2.date ) a
WHERE a.stock_id = 3

Result:

| STOCK_ID |                            DATE |   OPEN |   HIGH |    LOW |  CLOSE | VOLUME | P_HIGH |  P_LOW |
-------------------------------------------------------------------------------------------------------------
|        3 | February, 26 2013 00:00:00+0000 | (null) | (null) | (null) | (null) | (null) |    100 |     80 |
|        3 | February, 25 2013 00:00:00+0000 | (null) | (null) | (null) | (null) | (null) |    100 |     80 |
|        3 | February, 24 2013 00:00:00+0000 |     90 |    110 |     70 |     90 |    250 |    100 |     80 |
|        3 | February, 23 2013 00:00:00+0000 |     90 |    110 |     70 |     90 |    250 |    100 |     80 |
|        3 | February, 22 2013 00:00:00+0000 |     90 |    110 |     70 |     90 |    250 | (null) | (null) |
|        3 | February, 21 2013 00:00:00+0000 |     90 |    110 |     70 |     90 |    250 | (null) | (null) |
like image 182
Justin Avatar answered Sep 30 '22 17:09

Justin


FULL JOIN ?   TABLE1 FULL JOIN TABLE2 ON T1.DATE=T2.DATE
like image 28
Gentlezerg Avatar answered Sep 30 '22 17:09

Gentlezerg