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03_ABAP_SQL.md
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## Excursion: Database Tables and Views
<details>
<summary>Expand to view the details</summary>
<summary>🟢 Click to expand for more details</summary>
<br>
This section provides bullet points on database tables and views which contain persisted data. Note that the code snippets in this cheat sheet focus on database tables as [data source](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abendata_source_glosry.htm "Glossary Entry") for ABAP SQL statements.
@@ -78,7 +78,7 @@ This section provides bullet points on database tables and views which contain p
- are two-dimensional matrices consisting of rows and columns.
- contain a [table key](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abentable_key_glosry.htm), i. e. a field or a combination of fields uniquely identifies every row in a table. A [primary key](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenprimary_key_glosry.htm) must exist for every database table.
- Note the concept of [foreign keys](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenforeign_key_glosry.htm) in which one or more columns of a database table can be primary keys of another table. See more information [here](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenddic_database_tables_forkey.htm).
- have a [flat structure](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenflat_structure_glosry.htm "Glossary Entry")
- have a non-[nested structure](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abennested_structure_glosry.htm)
type. Plus, the definition of database tables consists of [technical](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenddic_database_tables_techstruc.htm) and [semantic](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenddic_database_tables_semastruc.htm) properties.
- can be referenced as a data type and can be accessed using ABAP SQL.