oracle11g

问题 I have a query whose results are stored in a GTT (Global Temporary Table) and in a Collection. Selecting the data from the GTT again, I get a very small cost: 103. SELECT ... FROM my_table_gtt JOIN table2 ... JOIN table3 ... But when switching this from a GTT to a Collection (VA - Virtual Array), the cost skyrockets (78.000), but the difference in execution times between the two is very small. SELECT ... FROM TABLE(CAST(my_table_va as my_table_tt)) JOIN table2 ... JOIN table3 ... My question

问题 I've a report table in Oracle Apex. I need to add a view button in each row, as the last column. On click on the view button, I need to popup a interactive grid /interactive report/classic report with some more details. Hard to describe, please refer the attachment. I'm using apex version is 19.1.0.00.15 each rows are having different set of where clause in SQL statement . Each row navigate to different pages, where i want to show the application/db/interface footprints 来源： https:/

问题 I am trying to run few queries on Oracle SQL developer e.g Select name AS CandidateName, age AS CandidateAge from tbl_candidate_details order by candidate_id desc But In the result I am getting the column names as "CANDIDATENAME" AND "CANDIDATEAGE". Is there a way where I can get this as camelcase characters what I have given in the select statement("CandidateName" and "CandidateAge") ? 回答1: If the column aliases are wrapped in double-quotes, SQL Developer will use those exact values as the

问题 The schema I'm working on has a small amount of customers, with lots of data per customer. In determining a partitioning strategy, my first thought was to partition by customer_id and then subpartition by range with a day interval. However you cannot use interval in subpartitions. Ultimately I would like a way to automatically create partitions for new customers as they are created, and also have automatic daily subpartitions created for the customers' data. All application queries are at the

问题 The schema I'm working on has a small amount of customers, with lots of data per customer. In determining a partitioning strategy, my first thought was to partition by customer_id and then subpartition by range with a day interval. However you cannot use interval in subpartitions. Ultimately I would like a way to automatically create partitions for new customers as they are created, and also have automatic daily subpartitions created for the customers' data. All application queries are at the

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

问题 What is the default operator precedence in Oracle's regular expressions when they don't contain parentheses? For example, given H|ha+ would it be evaluated as H|h and then concatenated to a as in ((H|h)a) , or would the H be alternated with ha as in (H|(ha)) ? Also, when does the + kick in, etc.? 回答1: Given the Oracle doc: Table 4-2 lists the list of metacharacters supported for use in regular expressions passed to SQL regular expression functions and conditions. These metacharacters conform

问题 I have to use JDBC to write to a database (hibernate/ibatis is not an option) and my database is Oracle 11g. I create the following query: insert into user(user_id, username, age, creation_ts) values(seq_userid.NEXTVAL, 'Jack', 19,TO_TIMESTAMP('14/12/2010 15/09/46', 'DD/MM/RR HH24/MI/SS')); However my statetement.execeuteUpdate(above sql) . generates an invalid sign exception. But when I perform the query in squirrel it gets commited just fine. Does anyone know why this is happening? Edit:

问题 This code: cursor.execute('select RLAMBD from ?', OPTable) print cursor.fetchone().RLAMBD produces this error: ProgrammingError: ('42S02', '[42S02] [Oracle][ODBC][Ora]ORA-00903: invalid table name\n (903) (SQLExecDirectW)') OPTable is an alphanumeric string which I've built from another database query which contains the table name I want to select from. The following code works just fine within the same script. sql = 'select RLAMBD from ' + OPTable cursor.execute(sql) print cursor.fetchone()

问题 I am making a query and trying to fetch a random number of rows from a database but Oracle keeps telling me my command has not been ended properly. select * from random_table order by random_column_name offset 0 rows fetch first 10 rows only This is the code I'm using. I would greatly appreciate any support since I've spent quite some time searching for an explanation for the outcome I'm getting, but to no avail. 回答1: That syntax isn't valid until Oracle Database 12c. You would say instead