oracle10g

问题 In a Spring-Hibernate application, hibernate.show_sql=true in log4j property file is enough to show to hibernate generated query. But what we have to do if we need the actual sql query.(For production environment i need to observer and verify the query before updating the schema). What i am going to do is, after the first schema generation in production( by hibernate itself) i dont want hibernate to update the schema(DDL).I want to hijack the alter, update (DDL) queries and after verification

问题 In a Spring-Hibernate application, hibernate.show_sql=true in log4j property file is enough to show to hibernate generated query. But what we have to do if we need the actual sql query.(For production environment i need to observer and verify the query before updating the schema). What i am going to do is, after the first schema generation in production( by hibernate itself) i dont want hibernate to update the schema(DDL).I want to hijack the alter, update (DDL) queries and after verification

问题 Code:- package jdbc; import java.io.File; import java.io.FileReader; import java.net.URL; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.util.Properties; public class Storing_Clob { public static void main(String[] args) throws Exception { DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); Properties p = new Properties(); p.put("user", "system"); p.put("password", "password"); Connection con = DriverManager

问题 I have the following recursive query which would run in 11g but is not supported in Oracle 10g database: with st as ( select rownum id, case when rownum-1 < 1 then null else rownum-1 end parent_id, customer, tickets from tickets ), st2(id, parent_id, customer, tickets, offset) as ( select id, parent_id, shuffler_id, subno, contrno, tickets, 0 offset from st where id = 1 union all select st2.id, st2.parent_id, st2.tickets, (st.tickets + st.offset) offset from st, st2 where st2.parent_id = st

问题 I have a scenario where we generate spool based on condition. The spool should generate only if user types y. column col noprint new_value elcm_script select decode(lower('&gen'),'y','C:\ELCM.SQL','n', 'null') col from dual; SPOOL c:\ELCM_DETAILS.SPL @&elcm_script spool off In the above it will generate spool file even if user type n like error reading file.. How to stop generating the spool if n.or how to remove spool which is generated/ 回答1: If you can put this controlling section into its

问题 I am trying to write a database view that selects from 2 tables. Here is an example: USER_TABLE - ID - USER_NAME FAMILY_TABLE - ID - FAMILY_NAME - FATHER_USER_NAME - MOTHER_USER_NAME - GRANDFATHER_1_USER_NAME ... (multiple user name columns) (The table writers didn't associate via ID for some reason) I essentially need to make a view that has each user listed, along with the names of the families they belong to. I have tried a number of things, but each seems to fail. I first tried to union

问题 how to increment the datetime value with the increment value as 30 minutes in oracle? In mssql i used the following query for solve my problem, i need the equivalent query in oracle with mycte as( select cast('2012-01-01 00:00:00' as datetime) DateValue union all select dateadd(minute,30,DateValue) from mycte where dateadd(minute,30,DateValue) <= '2012-01-01 23:59:00') select DateValue from mycte option (maxrecursion 32767); result for the above query is as follows: DateValue 2012-01-01 00:00

问题 After a long trial ,I finally successfully able to upload an image to an oracle database . At least my code says so. However to check whether the image has been successfully I wrote a servlet . After running the servlet I get a black screen in my browser and nothing else. The servlet code is: import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.sql.Blob; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement;

问题 I am trying to select two things customer_id and segment(based on some logic) which require both of them to be in GROUP BY I tried using without alias(like giving CASE...END) but it failed as there is MAX in a a GROUP BY fieldname . If I chop off MAX then also it fails to compile . What should I do to take care off this ? 回答1: I am not sure why you need "Group by" clause when you are already applying distinct. I strongly believe removing "Group by" clause from your query will give you the

问题 In this question, I was able to insert date in |----------|----------| | DT | FLAG | |----------|----------| | 2015-MAY | E | | 2015-JUN | H | | 2015-OCT | E | | 2016-FEB | E | |----------|----------| to get (missing months are inserted with the FLAG V ) |----------|----------| | DT | FLAG | |----------|----------| | 2015-MAY | E | | 2015-JUN | H | | 2015-JUL | V | | 2015-AUG | V | | 2015-SEP | V | | 2015-OCT | E | | 2015-NOV | V | | 2015-DEC | V | | 2016-JAN | V | | 2016-FEB | E | |---------