TBLCategories | Various Objective-C categories | iOS library
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kandi X-RAY | TBLCategories Summary
Objective-C and Swift categories we use on various projects.
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QUESTION
I have tblOuts that tracks Skus out of inventory by Category and date:
OutDate Category Sku 20210322 A 111 20210322 B 222 20210323 A 111 20210323 B 222 20210323 B 333 20210324 D 444I created a crosstab that will show the count of Skus by Category and OutDate:
Category 20210322 20210323 20210324 A 1 1 B 1 2 D 1How can I modify the crosstab to also show Category C, even though it doesn't have any data in my table yet?
Category 20210322 20210323 20210324 A 1 1 B 1 2 C D 1Normally I would create a separate table that listed all Categories and left join it to the crosstab. But I can't think of an ideal way to do so.
...ANSWER
Answered 2021-Mar-25 at 15:31Yes, I see what you mean by "doubled":
QUESTION
TblBook.cs
...ANSWER
Answered 2021-Jan-26 at 14:14Related entities are not loaded by default.
EF Core: Loading Related Entities
Also don't use a "TBL" prefix in your database or your code, and don't wrap the DbContext in an extra repository layer. It's already a repository.
So load with a query like:
QUESTION
I need to use IN operator in WHERE clause so I tried the next code with my SQL statement but it gives me the record for the first number only:
...ANSWER
Answered 2020-Dec-07 at 00:43It seems like you want to check if a value belongs to a comma-separated list. You can't do that with IN
, which expects a list of values, not a single string of values.
A generic solution uses string functions:
QUESTION
I want to use group by on data view with applying a filter.
...ANSWER
Answered 2020-Nov-01 at 08:50MyPubVar_Sort = "xProdID,xPrice"
MyPubVar_Filter = ""
MyPubVar_Filter = " xAccID = " & xAccID & "
AND
(xDate >= '" & xDate1 & "' AND xDate <= '" & xDate2 & "') "
MyVar_Dv_Quan = MyVar_Dt_Quan.DefaultView
MyVar_Dv_Quan.RowFilter = MyPubVar_Filter
Dim fruitGroups = MyVar_Dv_Quan.ToTable.AsEnumerable().
GroupBy(Function(row) New With {
Key .xAccID = row.Field(Of Int32)("xAccID"),
Key .xAccName = row.Field(Of String)("xAccName"),
Key .xProdID = row.Field(Of Int32)("xProdID"),
Key .xProdName = row.Field(Of String)("xProdName"),
Key .xPrice = row.Field(Of Double)("xPrice")
})
Dim tableResult = MyVar_Dv_Quan.ToTable.Clone()
For Each grp In fruitGroups
tableResult.Rows.Add(
grp.Key.xAccID,
grp.Key.xAccName,
grp.Key.xProdID,
grp.Key.xProdName,
grp.Key.xPrice,
grp.Sum(Function(row) row.Field(Of Double)("xxQuan")),
grp.Max(Function(row) row.Field(Of Date)("xDate")),
grp.Sum(Function(row) row.Field(Of Object)("xxCarCount")))
Next
Me.Dgv2.DataSource = tableResult
QUESTION
I have a requirement where there are two entities: Category
and Bookmark
. A category can contain some subcategories and/or some bookmarks. My table structure is as shown below:
tblCategories
...ANSWER
Answered 2020-Oct-29 at 14:10Since the Category and Subcategory also contain relationship, you could add a "ParentID" column in the "tblCategories" table, by using it, you could find the subcategory based on the "ParentID" column, like this:
The Dapper is used to query data from the database, I prefer to load all the categories and the bookmarks at once, then based on the category to find the subcategories and bookmarks.
So, I create the following classes:
QUESTION
I have the following CTE hierarchical query.
...ANSWER
Answered 2020-Aug-18 at 10:13Use boolean logic:
QUESTION
I have these four tables:
tblProducts
: ProductId, Name, Price, CategoryIdtblCategories
: CategoryId, NametblOrders
: OrderId, Date, TotaltblOrderDetails
: OrderDetailsId, OrderId, ProductId, Qty, Price
I want to create a procedure OrderDetails_SelectByOrderId
.
I want return type to be complex type in my app and I want these columns :
...ANSWER
Answered 2019-Jul-31 at 01:02This should do it. If CategoryNAME coming back as null, then you're doing a LEFT OUTER join and have referential integrity issues.
QUESTION
If I have tblBookInfo (bookId, title... etc.) and I want it to have categories column, what is the best way to do it?
Option 1categories table will have FK related to bookId like this
tblBookInfo ...ANSWER
Answered 2018-Jul-01 at 02:38It can be fairly straightforward to determine how to architect the database by a thorough understanding of the problem domain, examining the entities you've discovered, and being sure you understand the relationships between those entities.
Here you have two entities: Book and Category. It appears that two rules you've already determined from your problem domain are:
- A Book can belong to 1 or more Categories
- A Category can have 1 or more Books
The above can be simplified into "There exists a many-to-many relationship between Books and Categories."
In classic SQL database engines it is not possible to implement a many-to-many relationship directly between two tables. It must be implemented by a 1-to-many or 0-to-many relationship between each of the two original tables with and a new table that is used to cross-reference the rows of the original two tables. Such tables are variously called "cross-reference table", "relationship table", "join table" or "intersection table".
In your case, it appears that you need a table to cross-reference Books to Categories, and vice versa.
This might be diagrammed (somewhat poorly as it's hard to diagram in Stack Overflow) as:
QUESTION
Something seems to be broken...I have a asp textbox in my Web Forms application, that has a Required Field Validator. If the textbox is empty, it shows the validator but also executes the server code, in that case code for insert into a table:
...ANSWER
Answered 2018-Jun-14 at 04:32Add Validation Group in Button and RequiredFieldValidator :
QUESTION
I want to create a Database so i can automatically fill a form. But i don't know how i have to setup the database.
I want to create forms for a specific websiteID
and add to that website multiple Categories
with Items
attached to that categorie.
Here is my database right now:
...ANSWER
Answered 2018-Apr-04 at 13:47You'll save yourself a lot of pain if you work out the schema of your database visually using a tool like https://www.lucidchart.com/.
The operation you want to do is a JOIN
between tables on your various ID variables. That should work fine with your schema, but to make it more robust you should use FOREIGN KEY
s. For example, you should make categorieId
in tblItems
a FOREIGN KEY
to categorieId
in tblCategories
. This will ensure that every item in tblItems
has a valid categorieId
which can link it to tblCategories
.
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