Converting MySQL Queries To Oracle Compatible Queries
Jan 23, 2007
our system has always been running on mysql database and recently we have switched to oracle. As the current system is coded using mysql query syntax, when i run this program using oracle database, i got a error. The language that I'm using is JSP.
this is the error message:
The following query could not run on oracle. To convert these mysql queries to oracle compatible queries.
SELECT productID,productName FROM products order by productName;
select newsID,newsDate,newsHeadLine1 from news order by newsDate Desc limit 3
SELECT fuji_products.productID, productName_Display FROM products,products_availability where products_availability.productID=products.productID and (product_status='enabled' or product_status='all') AND category='12'
SELECT catID, catSub1 from category where catSub = '"+ prodCat +"' AND catSub1 is not null group by catSub1 order by catSub1
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Jun 10, 2010
I am migrating MySQL query's to oracle (sqlplus). Tell me what is the below code doing and equivalent for this code in oracle.
declare @start_date datetime
select @start_date='$first_date'
declare @end_date datetime
select @end_date='$end_date'
This is followed by
select distinct ' ', column from my_table;
I tried a lot of ways (set @start_date etc)but nothing really works.
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Nov 16, 2006
I have to change some queries from SQL to Oracle but I couldn't convert these queries because they use some system tables in SQL that I don't know the equivalent Oracle tables. Following are SQL Queries
1. SELECT name, xtype FROM sysobjects WHERE xtype IN('U', 'V') AND name <> 'dtProperties' AND objectproperty(id, 'IsMSShipped') = 0 ORDER BY name
2. SELECT tS.name FROM sysobjects AS tS WHERE (tS.name IN (SELECT name FROM sysobjects WHERE xtype = 'U') AND xtype ='U') OR (tS.name IN (SELECT name FROM sysobjects WHERE xtype = 'V') AND xtype ='V')
3. SELECT o.name as TableName, c.name as FieldName, c.colid as Field_Ordinal, t.name as FieldType, c.length as FieldLength, c.prec as FieldPrecision, c.scale as FieldScale, c.isnullable, c.iscomputed, CASE WHEN c.status & 0x80 > 0 THEN 1 ELSE 0 END AS isidentity, columnproperty(o.id, c.name, 'IsRowGuidCol') as isrowguidcol FROM (sysobjects o JOIN syscolumns c ON o.id = c.id) JOIN systypes t On c.xtype = t.xtype WHERE o.xtype IN ('U', 'V') AND (t.xtype = t.xusertype)
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Nov 18, 2010
I'm not sure is parallel query supported in xe ?
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Feb 6, 2013
Is there any oracle dictionary view which captures the queries being run by users on the database and time taken to execute those queries?We need to find out the OS user not the database user since we have to identify the users who are executing long running queries.We require this basically to monitor the long running queries on the database.
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Nov 12, 2012
is there any difference between
- returning from the procedure 2 ref cursors containing result set of 2 queries
- returning from the procedure 1 ref cursor containing result set of that 2 queries as one (with UNION ALL)?
Will 2nd option be faster or similar to 1st?
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Jun 16, 2009
I have a table similar to the following,
USER, DETAILS, TYPE, UPDATED
1, user1home1, 1, 01/05/2009
1, user1home2, 1, 02/05/2009
1, user1work, 2, 03/05/2009
1, user1mobile1, 3, 04/05/2009
1, user1mobile2, 3, 05/05/2009
1, user1email, 4, 06/05/2009
1, user1other, 5 ,07/05/2009
2, user2home1, 1, 01/05/2009
2, user2home2, 1, 02/05/2009
[code]...
which contains multiple contact details for users of different types; type 1 is home, type 2 work etc. The following query returns the user's number and the latest home number for that user.
select user, details as latest_home_number from nc_test t
where type = 1
and updated = (select max(updated) from nc_test t2
where t2.user = t.user
and t2.type = t.type)
order by t.user
However I am not very experienced with sql and I am not sure how to create a view which would contain the fields:
user, latest_home_number, latest_work_number
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May 1, 2011
I have performance problem with 7 queries involving groupby clauses in OLAP database.These are queries triggered during siebel DAC run
kumar[size="4"][/size][color="#0000FF"][/color]kumardba
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Feb 2, 2005
On a tab page should be displayed the result of four indifferent queries, each based on a stored procedure.At the moment, the queries are processed serially, by the statements:
GO_BLOCK('one');
CLEAR_BLOCK(No_Validate);
EXECUTE_QUERY;
GO_BLOCK('two');
CLEAR_BLOCK(No_Validate);
EXECUTE_QUERY;
Is there a way to processes the queries parallel ?
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Jul 30, 2012
We have the following case: an application modifies a table in an Oracle db (10.2.0.3.0).
Unfortunately the update SQL statements from the application always use the condition "where Column1 = 'some given value'" which is wrong (never mind why).
It should be instead "where Column1 = 'some value' and Column2 = 'val for Column2'. The 'val for Column2 will be taken from the very SQL query being issued (we can make the application do an update for Column2 even if the value in it never changes).
So all the update queries from the application look at the moment like that:
"update my_table set Column2 = 'val for Column2', Column3 = 'some other values', Column4 = 'some other value' where Column1 = 'some given value'".
We would like to capture them and somehow on the fly modify them to look like that:
"update my_table set Column2 = 'val for Column2', Column3 = 'some other values', Column4 = 'some other value' where Column1 = 'some given value' and Column2 = 'val for Column2'".
Can a trigger "before update" do it? For some reason we cannot at the moment ask the vendor to change the hard code of the application so we are looking for a temporary workaround.
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Dec 12, 2011
How can i join two quires together to get result.
My requirement is:
First i want to select Table as we do
Select * from tab;
Then i want to describe the table as we do
Desc WO;
How can we join these two queries to have result.
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Jun 4, 2013
I have two queries that I need to run and compare the outputs against each other. Each query runs on a different host. I can run each query on a different pane (Window - I am using Toad for running query). What I am trying to do is:
- Run both queries on a single pane
- Compare the output where if a "study" matches on both query output, then display the result.
To being with, is it possible to run the queries on a single pane by defining SID string as a part of query syntax......?
SELECT study,
TO_CHAR (completed_date, 'mm/dd/yyyy') completed_date, status
FROM ...
SELECT study, name
FROM .....
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Sep 15, 2010
I have some troubles when I try to retrieve last executed queries in a database.
For example;
I run the script below:
select distinct t.first_load_time, t.sql_text, t.last_load_time, s.username
from v_$sql t, v$session s
where s.username='SYS'
And as a result, I retrieve the queries executed by SYS user. But the problem is that, if SYS user executed the same query more than once,
only the very first record is shown.
It is like this,
SYS user executes "select * from table_abc" at 10:54:35, and after that SYS executes the same query at 13:45:55. and after running
the query above, I can only see the record which was executed at 10:54:35. I need to see the both results.
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Jun 5, 2012
SELECT b.KPCNO
,b.KPC_FULL_NAME
,min(c.time) in_time
FROM xxkpc_hr_personnel_v2 b
,xxkpc_fingerscan_data_v c
[code]........
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Aug 27, 2010
how to run two different Queries In One Report.
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Jan 15, 2013
How I can get the union result of 2 queries and put them in xml result, but I want each query to be in seperate xml element. I don t want to put 1 single xmlelement and do a From then construct a virtual table uniting the 2 subqueries
I mean I don t want something like the following:
(Select
XMLAGG(
XMLELEMENT("credit",
[Code]...
Except the 2nd alternative is not working I get error message: "SQL command not properly ended"
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Jan 31, 2013
I am trying to validate a monthly report so was trying to write queries to get different criteria into one table. So my first query returns all the product,second query returns all the enrolled customers, 3rd query returns all the cancelled customers and 4th query returns all the newly enrolled for a month. Is there a way I can pass the first query results into 1st column, 2 query results into 2nd column, 3 query results into 3rd column and so on.
I tired writing the SQL several different ways and have spent a day on it and still cannot figure it out. I am using SQL Developer.
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Jun 21, 2010
I have 4 select queries.
Query1
Query2
Query3
Query4
First Step:Combine Query1 and Query2,but the requirement is Query2 should only use the Acct_ID and Bill_ID which are output from Query1.
Second Step:Combine Query3 and Query4,but the requirement is Query4 should only use the Acct_ID and Bill_ID which are output from Query3.
Third Step: Is to now combine both the data set from First Step and Second Step.
In order to achieve my First and Second Steps I used WITH clause.
With S1 as ( Query1 ),
S2 as ( Query1 Union Query2)
Select S2.* from S1,S2
where S1.ACCT_ID=S2.ACCT_ID
AND S1.BILL_ID=S2.BILL_ID
With S3 as ( Query3 ),
S4 as ( Query3 Union Query4)
Select S2.* from S3,S4
where S3.ACCT_ID=S4.ACCT_ID
AND S3.BILL_ID=S4.BILL_ID
1. Is that approach right for achieving my First and Second step requirements ?
2. How to achieve Third Step ?
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Jul 11, 2012
I am trying to trace the SQL statements executed against a particular database user. I don't have AUDITING enabled and I am using Oracle 11g.I have the following query :
SELECT
S.MODULE,
SQL_TEXT ,
S.EXECUTIONS
FROM
[code].....
But if multiple users running the 'APP.EXE' are connected to the same db user, I am not able to understand which OS user executed which query. So I tried to join with V$SESSION view to get the user details.
SELECT
S.MODULE,SQL_TEXT ,SN.OSUSER, SN.MACHINE, S.EXECUTIONS
FROM
SYS.V_$SQL S,
SYS.ALL_USERS U,
V$SESSION SN
WHERE
S.PARSING_USER_ID=U.USER_ID
AND UPPER(U.USERNAME) IN ('USERNAME')
AND (UPPER(S.MODULE)='APP.EXE')
AND S.SQL_ID=SN.SQL_ID
ORDER BY S.LAST_LOAD_TIME
But this doesn't seems to be working(In my case it didn't return any rows) I have also tried the following
select S.SQL_TEXT,S.MODULE,S.EXECUTIONS,SN.OSUSER,SN.MACHINE,SN.SID, U.username,U.user_id from
SYS.V_$SQL S, v$open_cursor oc,SYS.ALL_USERS U,V$SESSION SN
where S.PARSING_USER_ID=U.USER_ID
AND UPPER(U.USERNAME) IN ('USERNAME')
AND (UPPER(S.MODULE)='APP.EXE')
and oc.SQL_ID=s.SQL_ID AND SN.SID=OC.SID AND SN.SADDR=OC.SADDR;
but I am not sure whether this is giving the right results. So, I have the following questions
1) How do I get the queries executed by each session?
2) The EXECUTIONS column of V_$SQL seems to the executions from all the sessions. How do I know the number of times a particular query is executed by a session?
3) How long a record about a query will be stored in V_$SQL? When do Oracle delete it from the view?
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Mar 19, 2013
Below are two queries , in merging two queries into a single so that out put coveres out put from below two queries
create table t_look as
select 1 a, 2 b, 3 c from dual union all
select 1 a, 20 b, 3 c from dual union all
select 1 a, 21 b, 3 c from dual union all
[Code]....
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Sep 6, 2012
I've small doubt regarding the subqueries in delete statements. observe the below statements with their results.
SQL> alter table emp3 rename column deptno to deptid;
Table altered.
SQL> select deptid from dept;
select deptid from dept
*
ERROR at line 1:
ORA-00904: "DEPTID": invalid identifier
[code]...
but when you use same subquery in update or select stmt it throws 'invalid identifier' or similar error.Why same does not happen with delete stmt ?
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Jul 31, 2012
I'd like to audit a table for any SELECT queries that are executed against it with no WHERE clause. I've read the documentation on DBMS_FGA carefully, and as close as I can tell, creating a policy with a NULL audit_condition causes all queries against the table to be audited, which isn't what I'm looking for.
What I'd like is something like this:
DBMS_FGA.ADD_POLICY (
object_schema => 'scott',
object_name => 'emp',
policy_name => 'mypolicy1',
audit_condition => 'WHERE CLAUSE IS ABSENT',
audit_column => 'comm,sal',
[code].......
SELECT * FROM EMP;but queries with conditions ('WHERE sal > 400', for instance) are not trapped.
I'm using 11gR2 (11.2.0.2) on OEL.
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Oct 10, 2011
I wonder how I can limit the queries in a table? This limitation would be that from a certain time, it allows queries. Before the opening hours, permitting no select.
Example: Allow SELECTs in table only after 16 p.m.
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Oct 21, 2012
I am trying to display the results from 2 queries, one is supposed to display the count of the employees, per department, who win over the average of the entire company and the other one is supposed to display the count of the employees, per department, who win under the average of the entire company.
I used a UNION ALL, but all it does is merge the results from the ones that win over and under the average into one row, is there a way to separate them? I tried assigning names to each salary using AS but it only displays the first I put in.
sql
Original
- sql Code
(
SELECT DE.DEPARTMENT_NAME, COUNT (EM.EMPLOYEE_ID) AS MAYORES
FROM DEPARTMENTS DE, EMPLOYEES EM
WHERE DE.DEPARTMENT_ID = EM.DEPARTMENT_ID
AND EM.SALARY > (SELECT AVG(EM.SALARY) FROM EMPLOYEES EM)
GROUP BY DE.DEPARTMENT_NAME
[code].....
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Oct 26, 2010
Is information in v$sql enough to select all queries executed between given date and now? When the queries are removed from v$sql?
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Apr 30, 2013
I am having 7 tables consider A,B,C,D,E,F,G. whereas A is master table and others are dependent on table A. columnA is referential key for all tables. Table A is having one DateRange column.I have successfully created range partitioning with partitioning key is DateRange. and Refeernce partitioning on other tables with column referring to ColumnA with foreign key. Also created local indexes on partitioned key DateRange.
Problem is that, while fetching complex queries for reports, it is taking more time as compared to non partitioning structure. Is ref partitioning affecting on complex queries, queries returning more rows?
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May 30, 2013
I have a few questions about querying using ranges and comma separated lists. The basic situation is a request comes in with part numbers that can be formatted in a range, comma separated lists or both. For an example, the request contains the following part numbers:
<pnum> 1-10, 14, 17, 11, 21-24 </pnum>
I can muster a basic SQL statement to query for this by hand (more then one way to do this)-
SELECT *
FROM part_table
WHERE pnum BETWEEN '1' AND '10'
OR pnum BETWEEN '21' AND '24'
OR pnum IN (14, 17, 11);
is there a way to create the BETWEEN statement so that the dash doesnt need to be parsed out of the request? (like BETWEEN '1-10') or something that functions to that extent? Is it also possible to nest the BETWEEN statements (or the functionality of the BETWEEN) in the IN statement?
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Aug 31, 2010
how to find out queries that took more than 15 seconds to execute.
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Jun 20, 2012
I have the scenario like below:
create table test_a (id number, b varchar2 (20));
create table test_b (id number, a number, b number, c number, d number, e number, f number);
insert into test_a values (1,'Manu');
insert into test_a values (2,'Tanu');
insert into test_a values (3,'Anu');
[code].....
convert the query above using joins instead of scalar queries, as scalar queries decreasing the performance.
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Jun 23, 2011
I would like to know the following.
If multiple queries are run in parallel(at the same time) against a table or a set of tables (query referencing multiple tables), does it reduce the performance.
In other words is Oracle capable of reading (selecting from) the same table multiple times in parllel.
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