oracle11gr1

Apply OFFSET and LIMIT in ORACLE for complex Join Queries?

由 ♀尐吖头ヾ 提交于 2020-06-26 12:16:40
问题 I'm using Oracle 11g and have a complex join query. In this query I really wanted to apply OFFSET and LIMIT in order to be get used in Spring Batch Framework effectively. I went through: How do I limit the number of rows returned by an Oracle query after ordering? and Alternatives to LIMIT and OFFSET for paging in Oracle But things are not very clear to me. My Query SELECT DEPT.ID rowobjid, DEPT.CREATOR createdby, DEPT.CREATE_DATE createddate, DEPT.UPDATED_BY updatedby, DEPT.LAST_UPDATE_DATE

column values in a row

由 孤街浪徒 提交于 2020-01-14 03:14:10
问题 I have following table id count hour age range ------------------------------------- 0 5 10 61 10-200 1 6 20 61 10-200 2 7 15 61 10-200 5 9 5 61 201-300 7 10 25 61 201-300 0 5 10 62 10-20 1 6 20 62 10-20 2 7 15 62 10-20 5 9 5 62 21-30 1 8 6 62 21-30 7 10 25 62 21-30 10 15 30 62 31-40 I need to select distinct values of column range I tried following query Select distinct range as interval from table name where age = 62; its result is in a column as follows: interval ---------- 10-20 21-30 31

How do you determine functional dependencies and a primary key?

由 拜拜、爱过 提交于 2019-12-24 15:18:46
问题 In my Oracle Database Programming course, the first part of our final lab assessment requires that we: Identify the Primary Key of the table as it is currently shown Find all functional dependencies of the table which we are given to work with. Draw the dependency diagram for the table(s) The table is in 1NF to begin with. From the research I have done, it seems like I need to essentially combine every possible FD, which would not only consume a very large amount of time, but seems bizarre

Issue with Oracle bind variables not using index properly

由 孤街醉人 提交于 2019-11-28 00:23:46
In my scenario, the following query runs fast (0.5 seconds on a table with 70 million rows): select * from Purchases where (purchase_id = 1700656396) and, it even runs fast using bind variables: var purchase_id number := 1700656396 select * from Purchases where (purchase_id = :purchase_id) These run fast because I have an index on the purchase_id column. (Keep reading...) I need to create a query that allows "filtering" on arbitrary columns. This means providing several input variables, and filtering on each one unless it is null . This works fine at first. For example, the following query

Issue with Oracle bind variables not using index properly

由 半城伤御伤魂 提交于 2019-11-26 21:42:11
问题 In my scenario, the following query runs fast (0.5 seconds on a table with 70 million rows): select * from Purchases where (purchase_id = 1700656396) and, it even runs fast using bind variables: var purchase_id number := 1700656396 select * from Purchases where (purchase_id = :purchase_id) These run fast because I have an index on the purchase_id column. (Keep reading...) I need to create a query that allows "filtering" on arbitrary columns. This means providing several input variables, and
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