Universe Schema

Hello Experts,

I am building an Universe and running into the below issue. Please advise ways to handle it.

I have three tables, table 1, table 2 and table 3 whose structure is as below.

Table 1         

Col_1_1

Col_1_2

Table 2

Col_2_1

Col_2_2

Col_2_3

Col_2_4

Table 3

Col_3_1

Col_3_2

Col_3_3

Col_3_4

Col_3_5

The relationship among these three tables are:

Table2.Col_2_2 = Table1.Col_1_1

Table2.Col_2_3 = Table1.Col_1_2

Table3.Col_2_2 = Table1.Col_1_1

Table3.Col_2_3 = Table1.Col_1_2

When Table 1 and Table 2 are joined in the schema with the above given relationship, things look good. However, when I try to joinTable 3 and Table 1,I get incompatible combination of tables error. This gets resolved by creating an alias of Table 1 and joining it to Table 3. I want to avoid the alias tables as there are many such relationships. Please advise on the same.

Thanks!