oracle10g

问题 I'm newbie using Oracle. I have a question: in SQL Server, we can use: DECLARE DBNAME1 VARCHAR(20) DECLARE DBNAME2 VARCHAR(20) SET @DBNAME1 ='TEST_DB' SET @DBNAME2 ='TEST_DB2' INSERT INTO @DBNAME1.TABLECORE SELECT * FROM @DBNAME2.TABLENONCORE T What is the equivalent of this script in if @DBNAME == Schema in Oracle? 回答1: We can manage it but creating db link on dbname2 : create public database link dbname2 connect to myschema using 'abc-scan.mycompany.com.tr:1521/dbname2.mycompany.com.tr';

问题 I am using oracle 10g. My (simplified) table definition is CREATE TABLE Student ("Rno" INT PRIMARY KEY) ; Which contains the following rows | RNO | |-----| | 1 | | 2 | | 3 | | 6 | | 8 | | 9 | | 12 | | 13 | | 14 | | 18 | How can I produce the following result set? | RESULT | |------------------------| | 1-3, 6, 8-9, 12-14, 18 | 回答1: You can use SELECT LISTAGG("Txt", ', ') WITHIN GROUP (ORDER BY "Rno") "Result" FROM (SELECT CASE WHEN MIN("Rno") = MAX("Rno") THEN CAST(MIN("Rno") AS VARCHAR2(11))

问题 I have a query that I'm trying to aggregate data based on hours between two unix timestamps in Oracle. Hardest part is that I get error'd out with " ORA-00936: missing expression " error even I don't see anything wrong in the query. Need some expert advice here. Below is the query - Query - select DATE(FROM_UNIXTIME(C.DATETIMEORIGINATION)) the_date, HOUR(FROM_UNIXTIME(C.DATETIMEORIGINATION)) the_hour, count(c.RECORD_ID) the_count FROM TABLE_A C WHERE C.DATETIMEORIGINATION between 1380033019

问题 Is it possible to put a limit in a bulk collect using execute immediate? I have below script but I am getting error when using a LIMIT. declare v_query varchar2(3000); begin v_query := 'select 1 from dual' -- this is just a sample query. execute immediate v_query bulk collect into table1 --table type end; If limit is not possible with my code, is there any work around? Thanks! 回答1: It seems that EXECUTE IMMEDIATE syntax doesn't allow for LIMIT in bulk collect clause http://docs.oracle.com/cd

问题 I don't know where to begin to debug this. Some developers have been writing some pl/sql code locally on their Windows machines that complete fine using Oracle 10.2.0.1.0 - 64bit. When it gets to production, which is Red Hat 5.3 and running 10.2.0.2.0, it gives me this error: ORA-00904: "S"."BARSTREAMREFERENCEID": invalid identifier Here is the gist of the code that is working in Windows: EXECUTE IMMEDIATE(' update candyman.CANDY_REFERENCES s set ( s.flavour, s.taste, s.colour, s

问题 I've developed a new Java(1.4) Stored Procedure in Oracle (10g). I've never done this before, I usually keep Java and the DB separated but this was a requisite. So I developed a Java code that can be deployed in Tomcat as well as a Stored Procedure in Oracle. For this I used the Java Logging API. I can execute the stored procedure in Oracle, but I can't find the logs. I would like to know what should I do in order to print the logs, it can be to Oracle logs or trc files, or even, if possible,

问题 I want to know how we can get record count using reference cursor in oracle10g. 回答1: After you fetched the rows you can use cursorname %rowcount to get the amount of records you fetched. 回答2: You cannot. You can only count the rows while you fetch them from the cursor. A cursor is like a stream, and Oracle does not know how much rows are in there until it has read them all (which happens as you fetch rows). 来源： https://stackoverflow.com/questions/1062142/how-to-get-record-count-using

问题 I am working on a project that needs migration of existing Oracle blobs into files. The environment to read from is a shared Oracle 10gR2 server. Currently I have a script using UTL_FILE. However, the process is pretty slow. It takes around 3 hours to extract 25 GB of sample data. The actual data to be moved is in the order of 1 TB. I need help/advice in tuning this significantly. Here is my process: Open a cursor to fetch the list of blob ids and names Start a loop to go thru each blob

问题 I need to split 1 amount into 2 fields . I know the total sums of the resulting fields = the ratio to split the first row, but i need to round the resulting sums and only then compute the ratio for next row (so the total sum of the rounded values will be correct). How can i write this algorithm in Oracle 10g PL/SQL? I need to test some migrated data. Here is what i came up with (so far): with temp as ( select 1 id, 200 amount, 642 total_a from dual union all select 2, 200, 642 from dual union

问题 CREATE PROCEDURE( p_cur OUT a_cur) IS type rec is record( a varchar2(2), b number, c number); type tab is table of rec; tab1 tab:=tab(); begin tab1.extend; tab1(tab1.last).a:='as'; tab1(tab1.last).b:=2; tab1(tab1.last).c:=3; tab1.extend; tab1(tab1.last).a:='jj'; tab1(tab1.last).b:=2; tab1(tab1.last).c:=3; --??--- end; I have created a nested table here tab1 ,but my issue is that i want to use this nested table in a cursor and want to return whole records using this nested table ,limitation is