WebVersion is Oracle Database 11g Enterprise Edition Release 11.2.0.3. When I join two tables use hash, and use 'leading' hint, it shows as below, t_userserviceinfo is drive table, i think it is ok even its cardinality is lagerer. WebFeb 11, 2024 · Cardinality is the number of rows the optimizer guesses will be processed for a plan step. If the stats are old, missing, or incomplete - then this can be wildly wrong. You want to look for where the optimizer sees 5 rows (cardinality) but in …
Cardinality , Parallel Hint alternative for MS-SQL
WebJul 22, 2024 · The CARDINALITY function returns a numeric value. If the nested table is empty, the CARDINALITY function returns NULL. If the nested table is an empty collection, … WebAug 6, 2008 · I have a question about the cardinality hint. How useful is it in Oracle 10g since now the dynamic_sampling level in 10g has been set to 2. From the explain plans that I have generated, I can see that for queries which have collections casted to tables, the plans generated in 10g do not really need the hint. raynor adams richmond va
using OPT_ESTIMATE or CARDINALITY hint to fix nested loop …
Web1. Finding CARDINALITY of Column. As we have discussed that we can find the cardinality of a nested column using the CARDINALITY function. So, in this example, we will find the … WebCARDINALITY Database Oracle Oracle Database Release 19 SQL Language Reference Table of Contents Search Download Table of Contents Title and Copyright Information Preface Changes in This Release for Oracle Database SQL Language Reference 1 Introduction to Oracle SQL 2 Basic Elements of Oracle SQL 3 Pseudocolumns 4 Operators 5 Expressions WebThe cardinality hint is used in two general cases, complex joins and dynamically created tables like global temporary tables (and possibly using materializations using the WITH clause): Here are some working … simplisafe smoke alarm chirping