NPC FROM WR00262_CONTRACT_HEADER ch join wr00262_contract_line ctl on ctl.
Error starting at line 8 in command: UPDATE A SET A.
However, combining these indexes together in a query can provide blistering response times a lot faster than the traditional method of reading each one of the 20 million rows in the base table.
For example, assume we wanted to find old blue Toyota Corollas manufactured in 1981: Oracle uses a specialized optimizer method called a bitmapped index merge to service this query.
The Oracle UPDATE statement is used to update existing records in a table in an Oracle database.
There are 2 syntaxes for an update query in Oracle depending on whether you are performing a traditional update or updating one table with data from another table.
This is the syntax: update (select T1.* from T1, T2 where .. They require a join condition between T1 and T2, and a unique index on the join column in T2 to assure that the select returns at most one column per row in T1.
This two-dimensional array represents each value within the index multiplied by the number of rows in the table.