... For large astronomical databases like the SDSS Science Archive, data loading is potentially the most time-consuming and labor-intensive part of archive operations, and it is also the most critical: it is the last chance to examine the data before it is published. ... We describe the sqlLoader -- a distributed workflow system of modules that check, load, validate and publish the data to the databases. ... Data errors cause reloads. ... Figure 2: (a) Data validation steps and (b) Distributed Loading. ...