Difference between SELECT statement and SELECT statement with FOR ALL ENTRIES in SAP ABAP

In SAP ABAP, the main difference between a SELECT statement and a SELECT statement with FOR ALL ENTRIES is that the former retrieves data directly from the database based on the specified conditions, while the latter uses a internal table for the selection criteria.

When using a regular SELECT statement, the system retrieves data from the database based on the conditions specified in the WHERE clause of the SQL query. This is useful when you want to fetch specific data from a single database table.

On the other hand, when using a SELECT statement with FOR ALL ENTRIES, you provide the system with a list of keys stored in an internal table, and it retrieves data from the database based on those keys. This is useful when you want to fetch data from multiple tables based on a common set of keys.

Overall, the SELECT statement is used for simple data retrieval from a single table, while the SELECT statement with FOR ALL ENTRIES is used for more complex data retrieval involving multiple tables.