am not very experienced with SQL. I have two tables:
Class
-----
ID (int)
Teacher (nvarchar)
Subject (nvarchar)
Student
--------
ID (int)
ClassID (int)
Name (nvarchar)
I am trying to write a SQL query that will give me the total number of students in each class. I have tried the following:
SELECT
c.ID,
c.Teacher,
c.Subject
COUNT(s.ID)
FROM
Class c LEFT OUTER JOINT ON Student s c.ID=s.ClassID
Unfortunately, that gives me an error of:Column 'Class.Teacher' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
I'm afraid if I place everything in a GROUP BY clause, I will get some invalid results.
I have two tables : oa_membership_dtl(in this created_by field is varchar2(200 byte) ,oa_partner_usr_dtl(in this table partner_userid is number(8,0) i need to do join on above fields.
I am using following two queries:
select * from oa_membership_dtl membership join oa_partner_usr_dtl partner_user on to_char(partner_user.partner_userid,'9999')=membership.created_by select * from oa_membership_dtl membership join oa_partner_usr_dtl partner_user on rtrim(ltrim(partner_user.partner_userid||' '))=rtrim(ltrim(membership.created_by))
by using first data is not fetched but 2nd is working fine , i am getting the matched records using 2nd query.
I have a piece of code that joined the same table onto itself twice in order to get the previous, current and future year's into columns in the same output.
Up until recently this has been working fine but the most recent data has just been uploaded into the table and now it comes up with an error.
On the second (left outer) join it now says that the column is ambiguously defined (ORA-00918). It doesn't matter which order the joins are in it is always the second join that the error pops up on.
Using Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
Here's a simplified version of the query I am having problems with:
SELECT assoc.association_id FROM mentor_initiative mi LEFT JOIN program assoc_prog ON assoc_prog.program_id = -1 LEFT JOIN mentor_association assoc ON assoc.mentor_initiative_id = mi.mentor_initiative_id AND NVL(assoc_prog.program_id, -1) = NVL(assoc.program_id, -1)
Note that there is no program with program id -1. So the assoc_prog left join will come up with nothing. I was thinking that since assoc_prog.program_id will be null, the second assoc left join would pick the row where assoc.program_id is null. However, the second left join doesn't join to any row.
In this query, it does join to an assoc row (I changed assoc_prog.program_id to NULL)
SELECT assoc.association_id FROM mentor_initiative mi LEFT JOIN program assoc_prog ON assoc_prog.program_id = -1 LEFT JOIN mentor_association assoc ON assoc.mentor_initiative_id = mi.mentor_initiative_id AND NVL(NULL, -1) = NVL(assoc.program_id, -1)
I was thinking it would join to an assoc row in the first query though. How can I change the first query to have the desired effect of left joining to a row where assoc.program_id is null if assoc_prog.program_id is null?
I have problems with the query below. Left join and right join is working. Well actually it's not working correct I think but that's another story wich I will leave for another posting. But with full join I am getting error ORA-00932.The columns starting with id_ are of number datatype and the ones starting with dat_ are of type date.Oracle points out the last line to be faulty. If I make that line a comment it points out the preceeding line and so on.
SQL> / and trunc(t.dat_trans) <= to_date(:sql_dat_avst_tom,'yyyymmdd') * ERROR at line 24: ORA-00932: inconsistent datatypes: expected NUMBER got DATE
I have two tables. i need to join the tables. The query is -
select v.c_venditore,v.s_venditore,v.t_diretto_indiretto,v.d_disattivazione,d.s_direzione from VENDITORE v,DIREZIONE d where v.p_direzione=d.p_direzione order by v.s_venditore
In the table VENDITORE there are 2919 rows. I need to display all the rows. But the joining column p_direzione has some null values.I need to display the null also. But to join the two tables this is the only condition. How can i display all the rows.
1. I installed Oracle 11g Personal Edition, Release 11.2.0.10, 64bits, 2. Test connection(oracle in oradb11g_home1) is successed in data source, odbc, 2. Then, I tried to connect this with Visual Basic(Visual Studio 2010), data connections, add connections, .net framework data provider for oracle, 3. but I received an error message as "Attempt to load Oracle client libraries threw BadImageFormatException." 4. Then, I download the ODAC(11.2.0.3.0) for 64bits, and installed, 5. I tried to test the connection, but failed with error message as stated above, "Unable to connect SQLState=08004 Oracle ODBC Ora-12154: TNS:could not resolve the connect identifier specified"
understanding a redo/undo concept . Refer following data
create table t(n number); insert into t values(10); commit;
now I update as following
update t set n=20;
As per my understanding the before image i.e. n=10 is stored in undo (to be used for rollback, transaction recovery and even in instance recover but not in media recovery) and after image n=20 is stored in redo (to be used for various recovery purposes including media recovery in case of consistent backup).
So it is redo logs for rolling forward and undo for rolling back making transaction, db consistent . If my above understanding is true then what is meant by the term 'redo required for undo'?
Also, if there are 2 database db1 and db2 connected using database link where we are populating t1 table in db1 using t2 table in db2 using db link where redo and undo will be updated db1 or db2?
I have been tasked to look at a technology / frameworks that will allow our company to develop tools that is quick and easy to learn and easily supported. We use Oracle architecture extensively in the organization and also have APEX 4.2 installed for development purposes. We have two basic requirements or functionality that we need to implement and I and now looking at a proof of concept to determine whether we should adopt APEX or not.
1. Forms Based Tools We have many databases with static content and users would like to have access to the data via a form. The form will allow the user to enter parameters (eg date) and on hitting a "Submit" Button, the database will be queried and a report generated and presented.
2. Diagnostics Tools This is a bit more involved and we require a view of our static data in real time. If a specific KPI threshold is violated (eg MOC < 85%) we would like to present an alarm on a dashboard showing the alarm. For example if there are 5 entities that MOC < 85% we would like to show a "red" indicator. If no entities violate a threshold and are above MOC > 85% we want to show a green indicator. We also want a drill down function, where if the indicator is "red", a drill down will show the details of all the entities that have violated the threshold.
I have described our basic requirements, but if it can easily be done in APEX we will definitely motivate for its use.
I want to write one wiki page which covered basic performance Tuning(PT) details means by some command, some GUI which can be understand by engineer,QA and PS guy with less effort , obviously I am going to introduce them with all the PT labels like what is AWR, ADDM etc.
Below is the sample code working fine in 10g and not working now in 11g.
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED "PSTest" AS import java.sql.SQLData; import java.sql.SQLException; import java.sql.SQLInput; import java.sql.SQLOutput; import java.util.List; [code]....
we got the below error: ORA-00932: inconsistent datatypes: expected an IN argument at position 1 that is an instance of an Oracle type convertible to an instance of a user defined Java class got an Oracle type that could not be converted to a java class
Current Oracle version is Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit and the version we are upgrading is Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit
1) A reverse engineering tool that I can point to an Oracle schema and get a "baseline" script to re-create that schema from scratch, with decently formatted DDL files (1 per object) neatly organized in a directory tree (by object type) and called in the correct order. Icing on the cake would be an option to pass the tool a list of tables containing static data and get DMLs to populate (insert) those tables as part of the script.
2) a diff tool that I can point to a pair of Oracle instances (source and target) containing a given schema and get a "delta" script to alter the target schema so that it becomes identical to the source schema. If data loss occurs on the target instance (i.e. drop a column) I would like to find a warning comment inserted in the script (e.g. "-- Attention: data migration DML needed here?"). Icing on the cake would be an option to pass the tool a list of tables containing static data and get DMLs to update (delete, update and insert) the data in the target tables to become identical to the contents in the source tables *without* deleting and re-inserting all rows (or dropping, recreating and repopulating the table).
3) I would like the above two tools (that, as you will have recognized, are basic to putting your database design under version control) to be open-source, with a command-line interface and a vibrant community backing them.
i want to know the difference between Left outer join Vs. Right outer join? Its like which join is safer to use or is there any recommendations to use any join?
I want to create a query with only the junction of these two queries:
- select id_utilizador,nbeneficiario,nome from adm_utilizadores a WHERE exists ( select 1 from adm_util_grupos b where a.id_utilizador = b.id_utilizador and b.id_grupo = '1') ;
- SELECT b.*,rownum as row_num FROM ADM_UTILIZADORES b ORDER BY $sidx $sord WHERE row_num BETWEEN $start AND $end";
Virtually want id_utilizador, nome, and nbeneficiario, I can get the first query, ordered me returning the first 10.
I have 2 tables SEC_MASTER_HISTA and SEC_MASTER_HISTB.
Now, I need to compare the data of the two tables column-wise.
Ideally the 2 tables should have the same security_alias values but in my case they do not as the two tables belong to 2 diff client models. There is however a main SECURITY_MASTERA and SECURITY_MASTERB tables which have the security_alias recorded and a primary_asset_id column value which can act as a link between SEC_MASTER_HISTA and SEC_MASTER_HISTB. But, I have not been able to figure out the exact query which will be ideal.
Attached are the table structures and the data it contains.
Note: I need to compare the Coupon and Freq column values of SEC_MASTER_HISTA and SEC_MASTER_HISTB.
im trying to update a column in the employee table with the value "YES". Im getting an error message saying im missing a SET statement from this code below:
update e SET e.review='YES' from employee inner join rentals r on e.employee_id=r.employee_id inner join job j on e.job_id=j.job_id where r.plate ='FY06WNT' and j.function !='MANAGER' and j.function !='PRESIDENT';
UPDATE dev10 SET c3 = dev12.c1 FROM dev10 INNER JOIN dev11 ON dev11.c3 = dev10.c1 CROSS JOIN dev12 WHERE (dev11.c2 LIKE 'BBBBBB') AND (dev12.c2 LIKE 'FFFFFF') / but, Oracle, what should we do new?
UPDATE Caxnode AS A INNER JOIN Caxnode AS B ON A.node_alias = B.node_alias SET A.partition_Type = 'LDOM', A.node_mode = 'LOGICAL', A.host_id = b.host_id, A.num_of_proc = b.num_of_proc WHERE (((A.node_mode)='virtual' Or (A.node_mode)='regular') AND ((B.partition_Type)='LDOM'));
This doesn't work in oracle, I googled and read that update doesnt work with inner join in oracle..
It is the simplest join or inner. An equijoin combines rows that have equivalent values for the specified columns.
SQL> select * from x;
NAME EMAIL EMPID Sam email@removed 1060 Rose email@removed 1061
[code]....
don't consider above mentioned queries I got valuable outputs.
NAMEEMAIL EMPID NAME EMAIL EMPID samemail@removed 1060 sam email@removed 1060 roseemail@removed 1061 rose email@removed 1061 sonaemail@removed 1062 sona email@removed 1062
Inner join shows matches only when they exist in both tables.so , i got records 1060,1061,1062
// Referencing columns used in a USING clause. SQL> select x.name,x.email,x.empid from x 2 inner join y 3 using (empid);
select x.name,x.email,x.empid from x * ERROR at line 1: ORA-25154: column part of USING clause cannot have qualifier
so query rewritten as
SQL> select x.name,x.email,empid from x 2 inner join y 3 using (empid); NAME EMAIL EMPID --------------- --------------- ---------- sam email@removed 1060 rose email@removed 1061 chris email@removed 1062
I mean see two different outputs.first output records twice displayed ... Yes i agree that is Inner join.second output records not displayed twice... common records only displayed once ,in x and y.
I think should n't use a table name or alias when referencing columns used in a USING clause... am i right ????
I want to know both are inner joins .how Oracle is determined both outputs ?
If i have a table T1 and a table T2. Table T1 is having 100 rows and table T2 is having 20 rows. When performing a Hash join ,which table should be used to make the hash table ,the larger one or the smaller one and why ?IF the data set is too small for considerations then please conser table T1 with 10 million of rows and table T2 with 1 million of rows.
SQL> desc RCA_SMART_CARD; Name Null? Type ----------------------------------------- -------- ---------------------------- N_CARD_ID NOT NULL NUMBER(10) C_CARD_SERIAL_NUMBER NOT NULL VARCHAR2(20) C_SIM_MSISDN VARCHAR2(20) C_SIM_IMSI VARCHAR2(20) C_LINKED_CARD VARCHAR2(20) N_PRO_IDENTIFIER NOT NULL NUMBER(4) C_CARD_TYPE VARCHAR2(1) N_SIM_STATE NUMBER(1) N_EEPROM_SPACE_LEFT NUMBER(9) N_VOLATILE_SPACE_LEFT NUMBER(9) N_NONVOLATILE_SPACE_LEFT NUMBER(9) N_CARD_OPTI NOT NULL NUMBER(15) N_PRODUCT_ID NUMBER(10) D_CREATION_DATE DATE D_MODIFICATION_DATE DATE D_STATUS_MODIFICATION_DATE DATE
SQL> desc IMEI; Name Null? Type ----------------------------------------- -------- ---------------------------- MSISDN NOT NULL VARCHAR2(20) IMEI NOT NULL VARCHAR2(16) DATE_MOD NUMBER(13) IMSI VARCHAR2(18) ICCID VARCHAR2(20) T_PROF RAW(20) EXTRA_DATA VARCHAR2(100)
If I want to join two table together . I want to search the number of record in IMEI that have N_SIM_STATE =1 in RCA_SMART_CARD . The MSISDN in IMEI is equal to C_SIM_MSISDN in RCA_SMART_CARD .
