Instructions: Write a SQL command for each type of join. Also, please describe the effect of each type of join; e.g. This join selects all rows in Table_A and those rows in Table_B with a matching Object_ID.

Table_A

A_ID	Object_ID	A_Attrib
1111	101	A-1
1112	102	A-2
1113	103	A-3
1114	104	A-4
1115	105	A-5
1116	103	A-3a

Table_B

B_ID	Object_ID	B_Attrib
2221	101	B-1
2222	102	B-2
2223	103	B-3
2224	201	B-4
2225	202	B-5