A line type defines the structure of a single row in an internal table.

· It can be a:

• Data element (e.g., MATNR)
• Structure (e.g., SFLIGHT)
• Custom type created via TYPES

Example:

TYPES: BEGIN OF ty_line,

matnr TYPE matnr,

maktx TYPE maktx,

END OF ty_line.

Here,

ty_line is the line type — it represents the structure of a single row.

A table type defines the entire internal table, including:

• Line type
• Access method (standard, sorted, hashed)
• Unique/non-unique keys

Example:TYPES: ty_table TYPE STANDARD TABLE OF ty_line WITH DEFAULT KEY.

Here:

· ty_line is the line type (structure of each row)

· ty_table is the table type (definition of the whole table)

Difference Between Line Type and Table Type