SELECTDISTINCTcolumn_1FROMtable_name;Code language:SQL (Structured Query Language)(sql) In this statement, theDISTINCToperator compares values in thecolumn_1of thetableto determine the duplicates. To retrieve u
你可以使用COUNT(DISTINCT col1 || '-' || col2)，但如果列是字符串值，并且你有'ab-'||'-'|...
Trying to concatenate multiple columns in OBI Recruiting Legacy Content Hello, I'm trying to concatenate multiple columns with spaces and commas in OBI Recruiting Legacy. Below is my current formula that I'm trying to use as an example and the output I wish to have. ...
Trying to concatenate multiple columns in OBI Recruiting Legacy Content Hello, I'm trying to concatenate multiple columns with spaces and commas in OBI Recruiting Legacy. Below is my current formula that I'm trying to use as an example and the output I wish to have. ...
A subquery isused only in conjunction with the XML keyword. When you specify asubquery, all values found by the subquery are used for pivoting. The output isnot the same cross-tabular format returned by non-XML pivot queries. Instead ofmultiple columns specified in the pivot_in_clause, the...
WHERE clause constraints are evaluated on the data before it is grouped. HAVING clause constraints are evaluated on the results of the data after it has been grouped together. You can specify multiple columns in a GROUP BY clause. For example, the following query includes the city and descripti...
(for an index on a table)(AVG_DATA_BLOCKS_PER_KEY)Clustering factor(how well ordered the rows are about the indexed values)(CLUSTERING_FACTOR)翻译: 索引从其根块到其叶块的深度(BLEVEL) 叶块数(LEAF_BLOCKS) 不同索引值的数目(DISTINCT_KEYS) 每个索引值的平均叶子块数(AVG_LEAF_BLOCKS_PER_KEY...
In the past, classic reports rendered when the result set contained multiple columns with the same name. In Application Express 18.1, the column names of the query result set must be unique, otherwise a "Column Ambiguously Defined" error occurs. You must change any non-unique report queries pr...
Oracle ASM uses an Oracle ASM instance, which is distinct from the database instance, to configure and manage disk groups. A single Oracle ASM instance can provide storage for multiple databases on the same server. For more information, see "About Oracle Automatic Storage Management" on page A...
Managing Columns Managing Constraints Managing Indexes Creating a Partitioned Table Managing Table Data Editing Temporary Tables Creating a Foreign Table View Management Sequence Management Users/Roles SQL Terminal Management Opening Multiple SQL Terminal Tabs Managing the SQL Query Execution...