database

Evaluate the following relational algebra expressions; your answers must include the column header with the attribute names. Note: technically, the relational algebra deals with sets of tuples. Sets do not keep duplicate elements, so don't show them in your answers. (Many real RDBMSS do allow duplicates.) (a) TEMPINITIAL (EMPLOYEE) (b) OEMP INITIAL='W'(EMPLOYEE) (c) TEMP_INITIAL,STORE_CODE(OSTORE CODE>EMP_CODE(EMPLOYEE)) (d) STORE REGION (e) TREGION_CODE,STORE_CODE(STORE REGION) (1) TREGION_CODE,STORE_NAME(STORE) U REGION (g) REGION (STORESTORE_CODE,EMP_LNAME (OSTORE_CODE