SAP TABLE COMP SELECTOR - Glossary

Get Example source ABAP code based on a different SAP table
  SAP Help

ARTICLE
• ~ ABAP_COLUMN_SELECTOR

Column selector
Character ~. A column (col) of a database table (dbtab) can be addressed in a SELECT statement by means of dbtab~col. This type of addressing is necessary when multiple database tables are accessed if the name of a column occurs in a number of different database tables or if two columns are compared with each other in a comparison in the WHERE condition.