Companies need to apply integrity constraints to every client, customer and employee. For example, an employee should belong to only one department. However, constraints can allow permissions.

Examples include triggers and referential integrity, as well as the primary topic of this month’s column, check constraints. Check Constraints are Supported in all Major DBMSs Check constraints are ...

PROC UPLOAD and PROC DOWNLOAD have been modified for Version 7 or Version 8 to enable the transfer of integrity constraints that are defined on a data set. As with other data set characteristics, ...

config.active_record.schema_format = :sql Simply put, sexy_pg_constraints adds a number of additional attributes that you can pass to an add_column or change_column invocation within your migration.