I am using linq on datatable in vb.net. I want to pass multiple where condition and return total of data column. how should i do that ? here is related sql statment select sum (price) where saletype="L" and carttype ="0"
Aliases allow you to rename columns in the result set for better readability. For example: SELECT name AS full_name, birthdate AS dob FROM people; Powered By Selecting multiple columns based on a condition To retrieve specific rows while selecting multiple columns, you can use the WHERE claus...
I generally recommend using Parameters but it is also possible to put all of your action queries in a single statement:prettyprint 复制 Public Sub CreateCommand(ByVal connectionString As String) Using connection As New SqlConnection(connectionString) Dim query As String = "INSERT INTO tbl_...
From the MySQL 5.7 docs page on join syntax: "INNER JOIN and , (comma) are semantically equivalent in the absence of a join condition: both produce a Cartesian product between the specified tables (that is, each and every row in the first table is joined to each and every row in the ...
In this scenario, you may experience a deadlock condition. An error that resembles the following is logged in the SQL Server Agent Job History: Description: Transaction (Process ID spid) was deadlocked on lock resources with another process and ...
{ SQLExecDirect(hstmt1, (SQLTCHAR*)"select operation_id, operation_code, product_id, quantity from dbo.operations where processed=0", SQL_NTS); while (SQL_ERROR!=SQLFetch(hstmt1)) { ProcessOperation(hstmt1); SQLPrepare(hstmt2, (SQLTCHAR*)"update dbo.operations set processed=1 where ...
3113.Find-the-Number-of-Subarrays-Where-Boundary-Elements-Are-Maximum (M) monotonic stack: other usages 084.Largest-Rectangle-in-Histogram (H) 2334.Subarray-With-Elements-Greater-Than-Varying-Threshold (M+) 085.Maximal-Rectangle (H-) 2866.Beautiful-Towers-II (H) 1504.Count-Submatrices-With-Al...
I commonly find that there is no shorthand way of sorting collections by multiple fields. A large amount of extra code is required just by adding in an extra field. What I really want to do is this: $collection->sortBy(['Surname', 'Foren...
why not (as a 1st step workaround) add the condition if ( is not VIEW) { INSERT ... } .. but maybe that is not easy-to-go-with as I understand Davi's remark about shared space for tables and views. I cannot accept data corruption as a result of valid and unreleated statements....
If this access condition isn’t satisfied (for example, if another node updated the blob in the short time since it was retrieved), the ETags wouldn’t match and a StorageClientException would be thrown: XML Copy catch (StorageClientException exc) { if (exc.StatusCode == HttpStatusCode....