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I have created a link between tables by foreign key. I may have to leave this foreign key value blank ( as there might not be a valid entry for this field) . At the moment referential integrity is forcing me to not leave this foreign key value blank. Because I have a foreign key declared does this mean that I have to enter a value here. ??????????
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I have created a link between tables by foreign key. I may have to leave this foreign key value blank ( as there might not be a valid entry for this field) . At the moment referential integrity is forcing me to not leave this foreign key value blank. Because I have a foreign key declared does this mean that I have to enter a value here. ??????????

Referential Integrity

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.