In most cases it is better to use a separate lookup table or a column for each field instead of storing data as comma-separated values for later lookup. However, there could be rare cases where the trick above could be useful. For example, recently I needed to return a list of values ...
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The issue here is the items in the list need to be separate values. If you pass them as a single CSV string like this: Copy code snippet Copied to Clipboard Error: Could not Copy Copied to Clipboard Error: Could not Copy select employee_id, first_name, last_name from hr.employees wher...
“Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] ...
String interpolation In some expressions, it's easier to concatenate strings using string interpolation, as the following code shows: C# stringuserName ="<Type your name here>";stringdate = DateTime.Today.ToShortDateString();// Use string interpolation to concatenate strings.stringstr =$"Hello{us...
SQL Copy This command will insert three new employees into theemployeestable in one go. It’s a much more efficient way of inserting multiple rows, akin to a librarian adding several books to the shelves at once, compared to executing multiple separate INSERT INTO statements. ...
Another option to join strings from a collection is to useString.Concatmethod. UseString.Joinmethod if a delimiter should separate source strings. The following code combines an array of words using both methods: C# string[] words = ["The","quick","brown","fox","jumps","over","the","...
Each software application needs a repository to store data so the information can be accessed, updated, and analyzed in the future. Arelational databasesuch as MySQL stores data in separate tables rather than putting all the data in one big storeroom. The database structure is organized into fi...
Two T-SQL functions that can help you prepare delimited strings are QUOTENAME and REPLACE. QUOTENAME returns a Unicode string with the delimiters added to make the input string a valid identifier. The QUOTENAME function uses this syntax: 复制 QUOTENAME ( 'string' [ , 'delimiter' ] ) You ...
If you don't need to send all of the DataTables contained in a DataSet, consider copying the DataTables you need to send into a separate DataSet. This will reduce the amount of data serialized by reducing the DataTables processed and by initializing the change buffers that are used by the...