How can I join an Advantage ADT table to a DBF table in a single query?
Create and use data dictionary. If the tables are both in a data dictionary, then you can join them just fine.
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I have two tables, each with a HashByte (MD5) Binary(50) field in. I'm trying to perform a JOIN on SSIS using MERGE JOIN stage, and while I KNOW that there are matches between the tables (I loaded the tables manually), they are not matching in the MERGE JOIN stage.
How do I handle JOINS on fields using Binary(50) HASHBYTE(MD5) values?
Thanks.
It has been a long time I used SSIS.
I try to join a sql table & an excel file.
The table has Category attribute in english.
The excel file has english category attribute & dutch category attribute.
I want to change the value of the sql table category attribute from english into the dutch version.
The destination is a new sql table with all the fields/attributes of the first sql table but the values of category attribute are in dutch.
I tried many times with merge join, union all and the join component but it fails many times.
Maybe I'm doing someting wrong.
Any help is welcome
Use the Merge Join component.
Before connecting your Excel Source and SQL Source make sure that the English Category column from both sources is A) The same datatype and B) Sorted by that column. Both inputs to a Merge Join MUST be sorted. Once sorted, connect your sources into the Merge Join. It will look something like this, Except with an Excel file on one side.
Sort both sources by Enlgish_Column and they will be detected as the join key for your Merge Join component.
I have 10 tables in hive. I'm joining all these 10 tables to form a single table.
I need unique records in the final hive table.
I can achieve this in two ways
1) Do distinct operation on each individual table and join all these tables to form final hive table.
2) I can join all the hive tables and on final hive table I can do distinct operation.
Any suggestion which option will be good performance wise or in both ways the performance will be same.
FYI- We have huge data in tables.
Thanks in advance.
I have two tables that do not have a relation defined with each other in the schema.yml.
However, table 1 has a foreign key reference to the primary key of table 2. Clearly, I goofed up by not designing the database well, but now it's mitigation time.
I must do a left join between the two tables coupled with a where clause that will retrieve the select rows I want. And to do this, I do:
Doctrine_Query::create()->select('t.*, l.lid')->from('Taxonomy t')->leftJoin('t.Cid c') ->leftJoin('c.Lesson l')->where('t.section = ?','Critical reading');
This should typically do it, but it does not because what it returns is all the rows from taxonomy table irrespective of the where condition. I am thinking, is this because of the relation not being specified in the column? That would be ridiculous cause the query works, only in a doctrine context it does not.
Thanks
In doctrine you can only join using the relations you defined on your schema, this is a know limitation. You may use the Native SQL feature as a workaround.
I am using a stored procedure to return some rows from the database and its using an inner join query between 3 different tables.
But when I am filling the Dataset using SqlDataAdapter with this line of code:
adptr.fill(ds,"TBL_Employees")
it says the columns of the other tables do not belong to the table name I mentioned in fill method, that's right because the columns belong to another table in join query.
I want to know how to use the Fill method or what I am doing wrong.