SQLazy Tool Merges Multiple Tables into Single Rows Using Full Outer Joins

A developer has demonstrated how SQLazy, a query tool using NSPL syntax, can merge four structurally similar tables with differently named ID columns into a single wide table. The approach first unifies all ID column names to a common alias, ID_main, using a derive step applied to each table. Full outer joins are then performed sequentially, appending one table at a time to the growing result set. After each join, a null-handling function merges the incoming ID into ID_main, ensuring every record retains a valid identifier regardless of which source tables it appears in. The method generates standard SQL using COALESCE under the hood and is designed to handle cases where an ID exists in only some of the source tables, filling absent columns with NULL.