select clause and i_is_deleted

1.select clause:SELECT [ALL|DISTINCT] columns

The optional ALL and DISTINCT keywords determine whether the SELECT statement returns duplicate rows. ALL returns all rows, including any duplicates. DISTINCT does not return duplicate rows. If neither keyword is included, the default is determined by the server’s default behavior. (The server’s default behavior is determined by the distinct_query_results flag in the server’s server.ini start‑up file.)
The DISTINCT keyword is ignored if the SELECT statement also includes an IN DOCUMENT or IN ASSEMBLY clause. The server issues a warning if the statement includes both the DISTINCT keyword and an IN DOCUMENT or IN ASSEMBLY clause.
The warning is also issued if the server’s default setting is not to return duplicates and the query contains an IN DOCUMENT or IN ASSEMBLY clause.

2.select clause: from type_name [(ALL)|(DELETED)|(LITE)]

The keyword ALL directs the server to search all versions of each object. The keyword DELETED directs the server to search all versions of each object including any versions for which i_is_deleted is set to TRUE. (This property is set to TRUE if you delete the object and it is the root version of a version tree). The keyword LITE directs the server to search only the properties in the lightweight type, otherwise the server also searches the properties in the shareable parent and the supertype(s). If you specify LITE, then you must only specify properties in the lightweight type. You must enclose ALL, DELETED, and LITE in parentheses.
If the FROM clause includes neither ALL nor DELETED, the server searches only the CURRENT version.

3.If the object is the root version of a version tree, deleting the object sets this property to TRUE.