Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I'd opt for this variant, because it's more efficient:</p> <pre><code>with all_dates_wo_boundary_values as ( select oldest + level the_date from ( select min(the_date) oldest , max(the_date) recent from your_table ) connect by level &lt;= recent - oldest - 1 ) select the_date from all_dates_wo_boundary_values minus select the_date from your_table </code></pre> <p>And here is some proof.<br> First the setup:</p> <pre><code>SQL&gt; create table your_table (the_date) 2 as 3 select date '2012-01-02' from dual union all 4 select date '2012-01-02' from dual union all 5 select date '2012-01-03' from dual union all 6 select date '2012-01-05' from dual union all 7 select date '2012-01-05' from dual union all 8 select date '2012-01-07' from dual union all 9 select date '2012-01-08' from dual 10 / Table created. SQL&gt; exec dbms_stats.gather_table_stats(user,'your_table') PL/SQL procedure successfully completed. SQL&gt; alter session set statistics_level = all 2 / Session altered. </code></pre> <p>Horse's query:</p> <pre><code>SQL&gt; with date_range as 2 ( select min(the_date) as oldest 3 , max(the_date) as recent 4 , max(the_date) - min(the_date) as total_days 5 from your_table 6 ) 7 , all_dates as 8 ( select ( select oldest from date_range) + level as a_date 9 from dual 10 connect by level &lt;= (select total_days from date_range) 11 ) 12 select ad.a_date 13 from all_dates ad 14 left join your_table yt on ad.a_date = yt.the_date 15 where yt.the_date is null 16 order by ad.a_date 17 / A_DATE ------------------- 04-01-2012 00:00:00 06-01-2012 00:00:00 2 rows selected. SQL&gt; select * from table(dbms_xplan.display_cursor(null,null,'allstats last')) 2 / PLAN_TABLE_OUTPUT -------------------------------------------------------------------------------------------------------------------------------------- SQL_ID gaqx49vb9gz9k, child number 0 ------------------------------------- with date_range as ( select min(the_date) as oldest , max(the_date) as recent , max(the_date) - min(the_date) as total_d ays from your_table ) , all_dates as ( select ( select oldest from date_range) + level as a_date from dual connect by level &lt;= (select total_days from date_range) ) select ad.a_date from all_dates ad left join your_table yt on ad.a_date = yt.the_date where yt.the_date is null order by ad.a_date Plan hash value: 1419150012 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | Reads | Writes | OMem | 1Mem | Used-Mem | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | 1 | TEMP TABLE TRANSFORMATION | | 1 | | 2 |00:00:00.01 | 22 | 1 | 1 | | | | | 2 | LOAD AS SELECT | | 1 | | 1 |00:00:00.01 | 7 | 0 | 1 | 262K| 262K| 262K (0)| | 3 | SORT AGGREGATE | | 1 | 1 | 1 |00:00:00.01 | 3 | 0 | 0 | | | | | 4 | TABLE ACCESS FULL | YOUR_TABLE | 1 | 7 | 7 |00:00:00.01 | 3 | 0 | 0 | | | | | 5 | SORT ORDER BY | | 1 | 1 | 2 |00:00:00.01 | 12 | 1 | 0 | 2048 | 2048 | 2048 (0)| |* 6 | FILTER | | 1 | | 2 |00:00:00.01 | 12 | 1 | 0 | | | | |* 7 | HASH JOIN OUTER | | 1 | 1 | 7 |00:00:00.01 | 12 | 1 | 0 | 1048K| 1048K| 707K (0)| | 8 | VIEW | | 1 | 1 | 6 |00:00:00.01 | 9 | 1 | 0 | | | | | 9 | CONNECT BY WITHOUT FILTERING| | 1 | | 6 |00:00:00.01 | 3 | 0 | 0 | | | | | 10 | FAST DUAL | | 1 | 1 | 1 |00:00:00.01 | 0 | 0 | 0 | | | | | 11 | VIEW | | 1 | 1 | 1 |00:00:00.01 | 3 | 0 | 0 | | | | | 12 | TABLE ACCESS FULL | SYS_TEMP_0FD9D660C_81240964 | 1 | 1 | 1 |00:00:00.01 | 3 | 0 | 0 | | | | | 13 | TABLE ACCESS FULL | YOUR_TABLE | 1 | 7 | 7 |00:00:00.01 | 3 | 0 | 0 | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Predicate Information (identified by operation id): --------------------------------------------------- 6 - filter("YT"."THE_DATE" IS NULL) 7 - access("YT"."THE_DATE"=INTERNAL_FUNCTION("AD"."A_DATE")) 32 rows selected. </code></pre> <p>And my suggestion:</p> <pre><code>SQL&gt; with all_dates_wo_boundary_values as 2 ( select oldest + level the_date 3 from ( select min(the_date) oldest 4 , max(the_date) recent 5 from your_table 6 ) 7 connect by level &lt;= recent - oldest - 1 8 ) 9 select the_date 10 from all_dates_wo_boundary_values 11 minus 12 select the_date 13 from your_table 14 / THE_DATE ------------------- 04-01-2012 00:00:00 06-01-2012 00:00:00 2 rows selected. SQL&gt; select * from table(dbms_xplan.display_cursor(null,null,'allstats last')) 2 / PLAN_TABLE_OUTPUT -------------------------------------------------------------------------------------------------------------------------------------- SQL_ID 7aavxmzkj7zq7, child number 0 ------------------------------------- with all_dates_wo_boundary_values as ( select oldest + level the_date from ( select min(the_date) oldest , max(the_date) recent from your_table ) connect by level &lt;= recent - oldest - 1 ) select the_date from all_dates_wo_boundary_values minus select the_date from your_table Plan hash value: 2293301832 ----------------------------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | OMem | 1Mem | Used-Mem | ----------------------------------------------------------------------------------------------------------------------------------- | 1 | MINUS | | 1 | | 2 |00:00:00.01 | 6 | | | | | 2 | SORT UNIQUE | | 1 | 1 | 5 |00:00:00.01 | 3 | 9216 | 9216 | 8192 (0)| | 3 | VIEW | | 1 | 1 | 5 |00:00:00.01 | 3 | | | | | 4 | CONNECT BY WITHOUT FILTERING| | 1 | | 5 |00:00:00.01 | 3 | | | | | 5 | VIEW | | 1 | 1 | 1 |00:00:00.01 | 3 | | | | | 6 | SORT AGGREGATE | | 1 | 1 | 1 |00:00:00.01 | 3 | | | | | 7 | TABLE ACCESS FULL | YOUR_TABLE | 1 | 7 | 7 |00:00:00.01 | 3 | | | | | 8 | SORT UNIQUE | | 1 | 7 | 5 |00:00:00.01 | 3 | 9216 | 9216 | 8192 (0)| | 9 | TABLE ACCESS FULL | YOUR_TABLE | 1 | 7 | 7 |00:00:00.01 | 3 | | | | ----------------------------------------------------------------------------------------------------------------------------------- 22 rows selected. </code></pre> <p>Regards,<br> Rob.</p>
    singulars
    1. This table or related slice is empty.
    1. POOracle: select missing dates
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USRob van Wijk
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload