Describe the six clauses in the syntax of an sql retrieval query. show what type of constructs can be specified in each of the six clauses. which of the six clauses are required and which are optional?

George heard about the benefits of a data warehouse. he wants to try implementing one for his organization. however, he is afraid that transferring data to the data warehouse will affect transaction time. which element ensures that transactions are not affected when moving data to a warehouse? when data is transferred to a data warehouse, the a area frees the source system to continue transaction processing.