Explain the followings:
1.) Acceess Sequences
2.) Condition records
3.) Condition types
4.) Condition tables

Condition Record:

A data record that stores a condition or condition supplements.

Conditions include:

Prices, Discounts and Surcharges, Taxes and Output.

Condition Type:

A characteristic of a condition.

For example, in pricing, different condition types are used to distinguish between a discount that refers to a net price and a discount that refers to a gross price.

Condition Table:

A table that defines the structure of condition record keys.

The key consists of a variable part that represents one or more fields, and a fixed part that is identical for all condition records.

Pricing Procedure in SAP works on the concept of Condition technique. 

Conclusion:

Each Pur Org is attached to a Pur Org Schema. Each Pur Schema has a pricing procedure attached to it.

For this, condition types are defined for each pricing procedure in SPRO. These condition types are then attached to Access Sequence. The access sequence in turn has a list of condition tables. These tables contain condition records. Each condition record fetches the applicable price.

You can go to SPRO and check for yourself how it works to understand it better.

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