I have a list of account names in listnames.txt
listnames.txt
James
Joey
Pete
I want to query those list of names in table account Using SQLPLUS the listnames.txt if keep on changing in sqlplus can do loop reading listname.txt?
Account table
1|Mike
2|James
3|Harris
4|Joey
5|Carl
6|Pete
Thanks
jigo
Its better you create a external table and based on that data, loop through your lookup table.
With external table you dont load data into db. it just creates a metadata structure of the file. so even if you file changes you can read the changed data directly from the file with a simple select, no need to load again and again.
Related
I have a csv file with two columns. The file has over 200.000 rows. Inside database I have the same table with the same values.
How can I write a script so that I can search for the values that are present in file but not in database?
I am using SQL Developer for this
Creating an External table is the best option when you want to read the contents of a flat-file using a select query.
Click here to know more about how to create an external table.
After creating the external table, you can make use of a query similar to below to identify the records which are exclusively available in the external table(i.e. flat file).
select *
from new_external_table et
where not exists (select 1 from source_table st where et.column_name=st.column_name);
I am new to SQL.
What is the best way to create a TXT file, if a table has records > 0?
The code already exists to remove or add records to this table.
I am looking for ways to create a trigger file (with no content in the file) at a specific network folder.
Preferably, I would want this TXT file to be removed at the end of the day, so the process could repeat itself every morning
On an after delete Trigger do a select count(*) from table or query one of the system catalog views. If its zero, then call a stored proc that poops a file onto your share drive.
To move the file you could create a small package or call a powershell or bcp (after enabling xp_cmdshell though), or you could create a CLR function (after enabling CLR). I guess since the latter two you need to change a server setting, you could just create a package.
Annnd since there is no data you dont actually need to export, you just create a blank file!
I am looking for a good generic SP in SQL server to load CSV files using the header row to create the necessary table columns for the temp table.
For example, I have a table with 20 columns in it, and I have been told to load a csv file into SQL server I have to load all the columns into the table. So, that means I have to go in and create all this by hand and then load the data. Think that is a time waster.
So, I was wondering if there was a way to read the header row use it to create the columns, whether my table has 10 or 20 and the use bulk update to load the data itself.
Suggestions?
I have a comma delimited text file containing discrepancies across two different databases, and need to update one of the databases with information from the aforementioned text file. The text file is in the following format:
ID valueFromDb1 valueFromDb2
1 1234 4321
2 2345 5432
... ... ...
I need to go update a table by checking for the ID value, and where valueFromDb1 exists replace it with valueFromDb2. There are around 11,000 rows that need to be updated. Is there a way I can access the information in this text file directly through an sql query? My other thought was to write a java program to do this for me, but I'm not convinced that is the easiest solution.
The article below demonstrates one way to read a text file in MS SQL Server by using xp_cmdshell. In order for it to work the file has to be on one of the drives of the server. Once you have the file loaded into a table variable (which is what the code in the article will do) you should be able to do the joins and updates pretty easily. Let us know if you need any other help.
http://www.kodyaz.com/articles/read-text-file-using-xp_cmdshell.aspx
I have Access as my back end. Student is the database name and its path is c:\Project\student.mdb
And am having few tables in it. When i click a command button in vb.net a new table must be created in the path mentioned. And it should have the fields I declare.
What s the query I need to use ? Is it possible to do like that ?
Yes, it's possible, you can check out the syntax for the create table command.
However, I have to say that creating tables dynamically suggests a bad database design. The database layout should normally remain the same whatever data you put in the database.
If you create tables dynamically, that means that you have data in the table names, but data should go inside the tables, not in table names (or even field names).
Yes it's possible . Just pass the create table command as query and the table name as variable , which you want to add dynamically. for reference of create table command
Create table command