Back to TopCauses. Cramps or spasms in the muscles often have no clear cause. Possible causes of hand or foot spasms include: Brain disorders, such asparkinson's disease,multiple sclerosis, dystonia, and Huntington's disease. Chronic kidney disease and dialysis.
SQL (pronounced ess-que-el) stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. SQL statements are used to perform tasks such as update data on a database, or retrieve data from a database.
Null (or NULL) is a special marker used in Structured Query Language to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E. F. 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.