Cluster Table , Aggregate Objects , Table , Template , Primary key , Unique Key SAP ABAP

How data is stored in cluster table

• A cluster table conatins data from mulitple DDIC tables. It stores data as a name value pair ( varkey, vardata)

What are aggregate object 

• Aggregate Object – Views, Match Code and Lock objects are called aggregate objects because they are formed from several related table.

What is the difference between Table and Template

• table is a dynamic and template is a static

What is the difference between Primary key and Unique Key?

•  Primary Key – It can accepts 0 value and cannot be NULL.
• Unique Key – It can be NULL.

What is the transaction code for Table maintenance?

•  SM30

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