
Chapter 2 Querying database builds on what we learned in Chapter 1 the query are a simply question that of which the datebase answers. For example if is was looking for people with the last name starting with J all the js will pop up. The wildcard are symbols that represent any character or combination of characters. One common wildcard, the
asterisk (*), represents any collection of characters. The other symbol is the
question mark (?) which means any indivdual characters. Criteria under design tab will find the person you are looking for. If you check the box you show the person name of the Query if not checked it will not show on the Query. An example is you are look for people that live in St. Louis not check the box and St. Louis will not but on the query. The parameter query prompts for input whenever it is used.
AND criterion is each individual criterion must be true in order the compound criterion to be true.
OR criterion is true provided either individual crierion is true.