Component Limitations in oracle apex 18.2

As per the Oracle Apex 18.2 documentation following limits are associated with different components, for more details please visit to documentation page.

Component	Limits
Interactive reports	999 rows per column heading filter  (if no custom LOV is specified in the column attributes).
Forms	32767 bytes for a text area or rich text editor item.  Two columns for primary key (when using built in DML processes).  For users with more than two primary key columns defined, you can also specify a   ROWID.
Tabular Forms	One wizard-generated tabular form per page (using built-in DML).  50 editable tabular form columns  (apex_application.g_f01-apex_application.g_f50), generated with apex_item or the   built-in tabular form display types.
Item names	Item names should not exceed 30 characters.  Items longer than 30 characters cannot be referenced using bind variable syntax.
Validations	Text entered for validations may not exceed 3,950 characters.
Data loading	When loading data, the maximum number of columns is 45.