I have a table with 5 columns: tag 1 tag 2 tag 3 tag 4 tag 5 If I want to show result开发者_StackOverflow中文版s ordered by the popularity(frequency) of those tags, what kind of query would i use?
I\'m sure this has been asked but I can\'t quite find the right search terms. Given a schema like this:
Suppose you have a table (in Oracle): CREATE TABLE CUSTOMER ( customer_id NUMBER, genderCHAR(1) ); And suppose you have a table type:
Given this sample dataset: item ---- item_iditem_nameitem_added 1Apple<date_time> 2Banana<date_time>
With the table: iddate_fromdate_to --------------------------- 12010-01-012010-03-01 22010-02-072010-05-01
I have 2 queries which display 2 different values but the results from one query are unexpected. Query1:
Let me explain what I mean with that quest开发者_如何学Pythonion: Lets say I have to tables like these:
Objective: When user browses to a particular seller, then display his average along with the average of sellers from similar category for easy comparison.
I have the following query: SELECT timestamp, COUNT(*) FROM table GROUP BY timestamp But some timestamps do not show up because there is no data.Here\'s an example
select min(lead), max(lead) from products WHERE part_line != 90 and category = \'x\' When I run the above q开发者_运维知识库uery the min returned is larger than the max. If I remove the condition p
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