[Home](./index.md) > [@datashaper/schema](./schema.md) > [JoinArgsBase](./schema.joinargsbase.md) > [on](./schema.joinargsbase.on.md) ## JoinArgsBase.on property Column names to join with. If only one is specified, it will use for both tables. If none are specified, all matching column names will be used. Signature: ```typescript on?: string[]; ```