Today, I am going to talk about table variables. In general, TSQL variables are defined by using the DECLARE key word and preceeding the variable name with a @ sign. Table variables are created by using the TABLE key word just after the variable name. The declaration following this key word includes column definitions — names, data types, and constraints. The only constraint types allowed in the declaration are PRIMARY KEY, UNIQUE, NULL, and CHECK. Indexes are a bi-product of a PRIMARY and UNIQUE constraints. The scope of a table…