not a programmer so need help with this one I am using Wordpress 3.0.2 and wp-calendar
i hav looked at the mysql data base in PhpMyAdmin under
wordpress - wp_calendar_categories - There is categories 0 -4 (5)
i wish to out put this data to a page in wordpress in the following format:-
for category 1 which is also in category 4 data output Title- date -time -location
for category 2 which is also in category 4 data output Title- date -time -location
for category 3 which is also in category 4 data output Title- date -time -location
using the commands with the wp-calendar plugin will not give me a output of cat1 in cat4
i can produce a list of all in each category in the following format Title - date - time- location
os any sql masters out there please help can give more info if required
THANKS
If I understand your question correctly you are trying to output information that is in multiple categories. For this you want a join.
SELECT title, date, time, location
FROM wp_calendar_categories c1
JOIN wp_calendar_categories c4
ON c1.title = c4.title
AND c1.date = c4.date
AND c1.time = c4.time
AND c1.location = c4.location
WHERE c1.category = 1
AND c4.category = 4
You can combine results (provided the columns are the same) using a union
SELECT title, date, time, location
....
UNION
SELECT title, date, time, location
I would advise searching on the web for SQL tutorials to help get you started.
Related
Dear stack overflow community,
This is my first post so please bear with me :)
I need to solve a SQL problem for a friend of mine.
He is running a web shop and wants to create a finance report.
The application he is using provides such functionality using an interface were MySQL queries can be executed.
I already created most of the report with my (limited) SQL knowledge, however I am struggeling to solve the last problem.
The goal of the report is to UNION and JOIN several tables to get an overview of all commissions, invoices and proposals with their respective articles and prices.
So what I did so far:
I did a union of commissions, invoices, proposals (lets call them receipt) and joined them with articles and prices.
That worked very well.
However, here is my problem:
An article could have multiple prices depending on the date of the respective receipt.
So I end up with more rows in my table as there should be.
There is a "valid_until" field within the prices table, which I have to use for the filter ... but how?
Example:
receipt_id
receipt_date
article_id
article_price
valid_until
price_id
209986-1
2020-09-10
2925
13
2020-12-06
1
209986-1
2020-09-10
2931
13
2020-09-09
2
209986-1
2020-09-10
2937
12,6
2020-09-12
3
209986-1
2020-09-10
2980
12,32
0000-00-00
4
In this case, only price_id 3 is valid as the receipt_date is "2020-09-10".
My Query (with limited SQL knowledge):
SELECT *
FROM (SELECT * FROM commissions UNION ALL SELECT * FROM invoices UNION ALL SELECT * FROM proposals) AS receipt
LEFT JOIN article ON receipt.article = article.id
LEFT JOIN prices ON article.id = prices.artikel
WHERE receipt.date <= IF(prices.valid_until = '0000-00-00', Date('3000-01-01'), prices.valid_until)
With that query I still get 3 results (price_id 4, 3 and 1).
I managed to identify the valid price using DATEDIFF(), ORDER BY and LIMIT, however MySQL does not allow to use LIMIT in sub-queries :(
Any help would be much appreciated.
KR,
Wlad
I'm trying to implement "seek" paging using jOOQ (3.11.12) + MySQL (5.7.24).
I have a table of products, that contains the following rows:
ID | Name | Created At
---------------------- --------- -------------------
XjpPXlZxT5i3tTjO7lZQ6Q Product A 2019-10-25 03:23:05
SmytEB9lTW-UiVFhg_gViQ Product B 2019-10-09 05:43:44
glpNYcsBTJqAzQERbgGh5g Product C 2019-10-02 14:53:48
HDZ1K7g_Rj-2vdQaEj79Ow Product D 2019-09-07 14:52:56
aTcWWxdJSReZBGzkLXuNIQ Product E 2019-09-06 08:21:24
HPOD380mTR-g2Ut4Da0k4Q Product F 2019-09-06 08:19:57
jXzfHBDAQ6We4CjXLem_WA Product G 2019-09-06 08:16:06
duxiQ3InRXaFy_JVDkkewQ Product H 2019-09-06 08:15:02
QF-3ECfLQD2vdVGE_5X-rQ Product I 2019-09-04 12:35:00
zRnp0tLZRjSsQHN0wV7N_w Product J 2019-09-04 12:34:28
6Y3E3KkITYWbOs5aOQCHOw Product K 2019-09-04 10:33:38
ZOoG06ThRTiDDhteIW_6tA Product L 2019-09-04 10:19:14
6UW4MUClSLSuQI3pkA0qJA Product M 2019-09-04 10:18:40
Assume my application shows pages of 5 products at a time, ordered from newest to oldest.
I'm therefore ordering by creation date descending, and also ordering by ID so as to disambiguate between products that may have been created at the same moment.
I'm trying to fetch the results what would be the second page. The code (with relevant runtime values substituted in) looks like such:
selectFromWhere // <-- assume this to be a SelectConditionStep built with various filter criteria
.orderBy(TBL_PRODUCT.CREATED_AT.desc(), TBL_PRODUCT.ID.asc())
.seek(2019-09-06T08:21:24Z, "aTcWWxdJSReZBGzkLXuNIQ") // <-- runtime values
.limit(limit)
.fetchInto(Product::class.java)
This generates the following SQL (fully-qualified references and filter criteria omitted for brevity):
select distinct
id, created_at
from tbl_product
where (
(
created_at < {ts '2019-09-06 08:21:24.0'}
or (
created_at = {ts '2019-09-06 08:21:24.0'}
and id > 'aTcWWxdJSReZBGzkLXuNIQ'
)
)
)
order by
created_at desc,
id asc
limit 5
If I copy/paste and run the generated query manually from a SQL session, I get the results I expect:
Product F
Product G
Product H
Product I
Product J
...however, the results of the execution are saved into a local variable, and when I debug my program to examine its contents, I see it contains:
Product I
Product J
Product K
Product L
Product M
Two questions:
Why would jOOQ return different results for the same query I run manually against the same database?
Is there something wrong with my approach?
Any suggestions would be greatly appreciated!
Assuming the database column type for TBL_PRODUCT.CREATED_AT is DATETIME and the corresponding Java type is java.sql.Timestamp (which would be the default in jOOQ 3.11), this situation could arise when the time zone of the MySQL server differs from that of the Java client, since the JDBC driver will convert the timestamp for you (see https://stackoverflow.com/a/14070771/1732086 for details).
This behavior can also be controlled using various JDBC connection URL parameters (see https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-configuration-properties.html). One option is to use the serverTimezone JDBC URL property to specify the client's time zone as the session time zone to be used (e.g. serverTimezone=Europe/Zurich).
Time zones can always cause nasty surprises, especially in the context of JDBC :-(
Say I've two tables products and brands having below data.
tbl_products
ID Name BrandID Price
1 Keyboard 1 100
2 Keyboard 2 120
3 Keyboard wireless 1 130
4 Keyboard wireless 2 150
tbl_brands
ID Name
1 Microsoft
2 Dell
3 HP
What I want is when I type 'Microsoft Keyboard' or 'Keyboard Microsoft' then it should list me product ID 1 and 3 not 2 or 4 even 2 or 4 has keyboard. I may search for more keywords but it should give me only the items matching itself.
SELECT p.*, b.Name BrandName FROM tbl_products p INNER JOIN tbl_brands b ON b.ID = p.BrandID WHERE p.Name LIKE '%Microsoft%' OR b.Name LIKE '%Microsoft%' OR p.Name LIKE '%Keyboard%' OR b.Name LIKE '%Keyboard%'
Please help me to write proper MySQL query or any schema change with query..
Appreciate the question. Though I don't have exact answer but surely can discuss one approach to solve the problem.
STEP 1 Get BRAND NAME+NAME as single string.
STEP 2 Tokenise the entered STRING. Example Microsoft Keyboard = Mincrosoft,Keyboard Following Link for spliting the entered data. How do I split a string so I can access item x?
STEP 3 DO a like query on the string obtained in step 1.
I am asking this question in the hope there is a more efficient (faster) way to pull and insert data in the the tables I am working with.
The basic structure of the data table is
ID Doc_ID Field Value
1 10 Title abc
2 10 Abstract xyz
3 10 Author Bob
4 11 Publisher Bookworms
5 11 Title zzz
6 11 Abstract bbb
7 12 Title aaa
8 12 Sale No
In other words the data tables are row based, each row contain a document id and the corresponding field value. Not all documents have the same number of fields defined. Indeed books may differ radically from magazines.
The data table is 10,000,000 rows typically a document has 100 fields associated with it.
So the performance problem I am finding is pulling a report with reference to 50+ different fields, for example if I have a query list in an order_table the query could be like
select ord.number as 'Order ID', d1.value as 'Title', d2.value as 'Author' .......
from order_table ord
LEFT JOIN data_table as d1 on d1.Doc_ID=ord.Doc_ID and d1.Field='Title'
LEFT JOIN data_table as d2 on d2.Doc_ID=ord.Doc_ID and d2.Field='Author'
........
LEFT JOIN data_table as d50 on d50.Doc_ID=ord.Doc_ID and d50.Field='Qty'
Using LEFT JOINS as there is no guarantee that the field is defined for that document.
Given there may be some WHERE parameters to limit the list to items (in stock for example or below a price) it is a slow query. Indexes don't really much.
Without being able to change the data model, what is the best way to pull volumes of information out?
I need to create a join query for hierarchical data across 2 tables. These tables can have unlimited amounts of data and their structures are as follows:
group_id group_name group_order
1 group 1 2
2 group 2 1
field_id field_name parent_group field_order
1 field 1 1 1
2 field 2 2 2
3 field 3 2 1
I am currently able to get the correct format of data using 2 select queries with the second query inside a loop created from the results of the first query on the groups table.
The structure of the data I require from the result is as follows:
-group 2
- field 3
- field 2
- group 1
- field 1
Is it possible to get these results from one mysql query? I have read through the mysql document on hierarchical data by I am confused about how to incorporate the join.
Thanks for looking
You shouldn't need to think about it in terms of hierarchical data, you should just be able to select your fields and join on your group information. Try something like:
SELECT *
FROM Fields AS F
INNER JOIN Groups AS G
ON G.group_id = F.parent_group
ORDER BY group_order, field_order
Then you will get each fields as a row with the applicable group, also in the correct group order. Your loop should be able to handle the display you need.
one method
something that may convince you change your db schema