![]() column DATE(LEFT(TABLECOLUMN,4),MID(TABLECOLUMN,5,2),RIGHT(TABLECOLUMN,2)) and this should work for this situation. Hi there, Id like to ask the community for some advice and best practices around a very common scenario I have with an SSAS Tabular model. But we could convert YYYYMMDD to datetime type, create a new column using. Table toTable = ĭataColumn toColumn = (DataColumn)fromTable. When the column is YYYYMMDD, I don't think Tabular model will take care of this automatically. Table fromTable = ĭataColumn fromColumn = (DataColumn)fromTable.Columns String _fromColumn = srcTableAndTabularColMap String _fromTable = srcAndTabularTableMap String _toColumn = srcTableAndTabularColMap OleDbCommand command = connection.CreateCommand() Ĭommand.CommandText = "select source_parent_table_name,source_parent_column_name, source_child_table_name,source_child_column_name from HX_VIEWS_RMS.BI_TABULAR_RELATIONSHIPS where MODEL_NAME='"+ +"'" OleDbConnection connection = new OleDbConnection() Ĭonnection.ConnectionString = metadataConnInfo.ConnectionString While trying to add FromTable and ToTable properties to relationship object i was getting an error saying those properties are read-only and cannot be changed.īelow is the sample code that i am using to create relationships. I am successful in creating tables and columns, but unable to create relationships under model. Now, this is just an example, but it can make you think more about database design and how important it is.I am trying to create a simple tool that creates a model from metadata. For more information, please refer to Requirements for relationships. You could set one relationship to inactive. It depends on how the end user wants to interact with the data but one option is to duplicate your master table. ![]() Then creating a measure with the USERELATIONSHIP function to activate this relationship for that measure. ![]() But, if you used an int as the key, you will always have to join to the State table just to get the StateAbbreviation. In SSAS tabular model, you can only have one physical relationship between two tables active at a time. You should be able to solve this by creating an inactive relationship between the Date and Clientes tables. Still, if you dont need the time part in the DimDates Date column, why dont you just change it to the Date datatype. And, for Tabular, you should prefer date data types over integer DateIDs when working with calendar data. Is one less join for the query and less overhead. Tabular will match your dates from fact to your corresponding datetimes from DimDate. If you place the StateAbbreviation in the Detail table and never have to join to state table, then that And, what if the application and report tool never need the State Full Name. The problem with this method is you get all the columns from all the tables selected. ![]() The easy way is to just select the tables like Figure 1. Product Name like "White 10-speed Mountain Bike", and integer for this Product ID (1001) takes up less space in both tables and speeds up the join between a Product table and a SaleOrderDetail table.īut say you have a State table and the StateAbbreviation is 2 characters. The first step in importing tables and data is selecting a table, view or T-SQL statement to bring data into a Tabular Model. Since text columns can have verbose data, i.e. The key to this best practice is finding the best query plan for the join. But, in a Dimensional Model, you should always use a Surrogate Key (int data type) for all Dimension tables and a foreign key to that Surrogate key from the Fact table. There is no rule against use text versus int for a key and foreign key.
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