# Configure Table/s from Database
To select one or more tables:
* Select the *Connection Name* from the drop down menu.
* Select the desired schema.
* Select the checkboxes for all the tables that need to be validated.
* Click on *Add Selected* at the bottom.
#### Advanced Options
For large tables, it is recommended to provide a partition column so Vexdata can pull the data in parallel. Vexdata can autodetect the partition column; however, it is recommended that users provide this partition.
**Rules for selecting the partition column :**
* The column should have an index.
* The column should be numeric or a date-column.
* If the column is of string-type, ensure the bucket size is not too low for a distinct value.
* Example : If you have to choose between city and person\_name, select city as partition column, as person\_name is highly unique.
