Validating null in pl sql

13-Feb-2017 17:05

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In SQL, is a reserved word used to identify this marker. A null value indicates a lack of a value - a lack of a value is not the same thing as a value of zero in the same way that a lack of an answer is not the same thing as an answer of "no".

Data validation is a critical part of your application to ensure your data meets the requirements developed by your business analysts.

There are a number of different processes that can be used to make sure your data validates against your business rules.

Null (or NULL) is a special marker used in Structured Query Language (SQL) to indicate that a data value does not exist in the database.

Introduced by the creator of the relational database model, E. Codd, SQL Null serves to fulfil the requirement that all true relational database management systems (RDBMS) support a representation of "missing information and inapplicable information".

In SQL, is a reserved word used to identify this marker. A null value indicates a lack of a value - a lack of a value is not the same thing as a value of zero in the same way that a lack of an answer is not the same thing as an answer of "no".Data validation is a critical part of your application to ensure your data meets the requirements developed by your business analysts.There are a number of different processes that can be used to make sure your data validates against your business rules.Null (or NULL) is a special marker used in Structured Query Language (SQL) to indicate that a data value does not exist in the database.Introduced by the creator of the relational database model, E. Codd, SQL Null serves to fulfil the requirement that all true relational database management systems (RDBMS) support a representation of "missing information and inapplicable information".Data validate rules can be enforced within your application code in the application layer; or data can be validated by the database engine.