update_statistics_statement 

<update_statistics_statement> ::=
  UPDATE STAT[ISTICS] COLUMN <table_name>.<column_name>
    [ESTIMATE [<sample_definition>]]
| UPDATE STAT[ISTICS] COLUMN (<column_name>,...) FOR <table_name>
    [ESTIMATE [<sample_definition>]]
| UPDATE STAT[ISTICS] COLUMN (*) FOR <table_name>
    [ESTIMATE [<sample_definition>]]
| UPDATE STAT[ISTICS] <table_name> [ESTIMATE [<sample_definition>]]
| UPDATE STAT[ISTICS] [<schema_name>.][<identifier>]* [ESTIMATE [<sample_definition>]]
| UPDATE STAT[ISTICS] AS PER SYSTEM TABLE