sql server - Optimized sql query for 5 parent and child table with relation?how -

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i have 5 table in database shown in image below link

the join this:

 tablea----->tableb------>tablec---------->tabled----->table

see image fields [name fields in image amount , in nvarchar(max) ]

image of relation

now want apply optimized queries save response time like

1-sum (amount) of db making join of b b c d 2-simlarly agreagate function in clause 3-calculations 4-count

i prefer solution without inner join since takes more response time , fails if 1 join fails.

in cases failure in relation of a---b not give record of c etc


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