outer-join

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Want to exclude from the query some records, but I do not know how

I have three tables like this: messages user_id | message 2| \'foo\' 3| \'bar\' blacklists user_id | blacklister_id[详细]

2023-03-19 14:38 分类：问答
SQL view, performance and count from one-to-many relationship

I need some help with forming basic SQL-VIEWs for a bunch of my tables. Here\'s a quick overview I\'ve a ClaimDetail table and it has got some Lookup fields like StatusID, BrandID, SalespersonID, e[详细]

2023-03-16 14:04 分类：问答
Do I have this LEFT JOIN right?

I need to find the total number of customers created after a given date that haven\'t yet ordered. I have two tables:[详细]

2023-03-16 04:27 分类：问答
Need help with SQL query - out join solution?

I have a database table of email addresses. I want to query it based on a set of strings. I do not just want the query results to return those email addresses contained in the set of strings - that w[详细]

2023-03-14 02:17 分类：问答
Join two queries with COUNT from the same table in MySQL

I have two queries that I run in the same table: SELECT id, COUNT(up) FROM comentarios WHERE up = 1 GROUP BY id[详细]

2023-03-12 06:39 分类：问答
Left Outer Join

List<ServicePacksDTO> allServicePacks = new List<ServicePacksDTO>(); using (var db = new DataContext())[详细]

2023-03-11 15:10 分类：问答
Displaying rows with count 0 in MySQL using COUNT and GROUP BY

I have two tables, Subject and Content, where Content references Subject with foreign key. I want to display how many times each subject appears in Content table (0, if it does not appear). But the qu[详细]

2023-03-11 14:54 分类：问答
How to generalize outer to n dimensions?

The standard R expression outer(X, Y, f) evaluates to a matrix whose (i, j)-th entry has the value f(X[i], Y[j]).[详细]

2023-03-09 08:00 分类：问答
How can I select a subset of columns from a table when relevant in an outer join?

select a.cust_xref_id, a.est_hour, a.phone_nbr as number, a.credit_calls, a.credit_rpcs, b.sdp_calls from #temp0 a[详细]

2023-03-09 06:50 分类：问答
sql, outer join

I have two tables, linked with an outer join. The relationship between the primary and secondary table is a 1 to [0..n].The secondary table includes a timestamp column indicating when the record was a[详细]

2023-03-07 18:00 分类：问答