I have 2 Oracle questions
How do I translate this SQL Server statement to work on Oracle?
Create table MyCount(Line int identity(1,1))
What is the equivalent of SQL Servers Image type for storing pictures in an Orace database?
You don't need to use triggers for this if you manage the inserts:
CREATE SEQUENCE seq;
CREATE TABLE mycount
(
line NUMBER(10,0)
);
Then, to insert a value:
INSERT INTO mycount(line) VALUES (seq.nextval);
For images, you can use BLOBs to store any binary data or BFILE to manage more or less as a BLOB but the data is stored on file system, for instance a jpg file.
References:
Create Sequence reference.
Create table reference.
Oracle® Database Application Developer's Guide - Large Objects.
1: You'll have to create a sequence and a trigger
CREATE SEQUENCE MyCountIdSeq;
CREATE TABLE MyCount (
Line INTEGER NOT NULL,
...
);
CREATE TRIGGER MyCountInsTrg BEFORE INSERT ON MyCount FOR EACH ROW AS
BEGIN
SELECT MyCountIdSeq.NEXTVAL INTO :new.Line
END;
/
2: BLOB.
Our tools can answer these questions for you. I'm talking about Oracle SQL Developer.
First - it has a Create Table wizard - and 12/18c Database supports native implementation of Identity columns.
And your new table DDL
CREATE TABLE MYCOUNT
(
LINE INT GENERATED ALWAYS AS IDENTITY NOT NULL
);
Also, we have a Translator - it can take SQL Server bits and turn them into equivalent Oracle bits. There's a full-blown migration wizard which will capture and convert your entire data model.
But for one-offs, you can use your Scratchpad. It's available under the Tools, Migrations menu.
Here it is taking your code and giving you something that would work in any Oracle Database.
Definitely use the identity feature in 12/18c if you're on that version of Oracle. Fewer db objects to maintain.
Related
I'm trying to work out a specific way to copy all data from a particular table (let's call it opportunities) and copy it into a new table, with a timestamp of the date copied into the new table, for the sole purpose of generating historic data into a database hosted in Azure Data Warehousing.
What's the best way to do this? So far I've gone and created a duplicate table in the data warehouse, with an additional column called datecopied
The query I've started using is:
SELECT OppName, Oppvalue
INTO Hst_Opportunities
FROM dbo.opportunities
I am not really sure where to go from here!
SELECT INTO is not supported in Azure SQL Data Warehouse at this time. You should familiarise yourself with the CREATE TABLE AS or CTAS syntax, which is the equivalent in Azure DW.
If you want to fix the copy date, simply assign it to a variable prior to the CTAS, something like this:
DECLARE #copyDate DATETIME2 = CURRENT_TIMESTAMP
CREATE TABLE dbo.Hst_Opportunities
WITH
(
CLUSTERED COLUMNSTORE INDEX,
DISTRIBUTION = ROUND_ROBIN
)
AS
SELECT OppName, Oppvalue, #copyDate AS copyDate
FROM dbo.opportunities;
I should also mention that the use case for Azure DW is million and billions of rows with terabytes of data. It doesn't tend to do well at low volume, so consider if you need this product, a traditional SQL Server 2016 install, or Azure SQL Database.
You can write insert into select query like below which will work with SQL Server 2008 +, Azure SQL datawarehouse
INSERT INTO Hst_Opportunities
SELECT OppName, Oppvalue, DATEDIFF(SECOND,{d '1970-01-01'},current_timestamp)
FROM dbo.opportunities
what is the format of schema when we create a new table using Voltdb?
I'm a newbie. I have researched for a while and read the explanation in this https://docs.voltdb.com/UsingVoltDB/ChapDesignSchema.php
Please give me more detal about the schema format when I create a new table.
Another quesiton is What is the call flow of the system, since a request comes to the system until a response is create.
Which class/function does it go through in the system.
Since VoltDB is a SQL compliant database, you would create a new table in VoltDB just as you would create a new table in any other traditional relational database. For e.g.,
CREATE TABLE MY_TABLE (id INTEGER NOT NULL, name VARCHAR(10));
You can find all the SQL DDL statements that you can run on VoltDB here
1.Make file yourSchemaName.sql anywhere in the system. Suppose yourSchemaName.sql looks like this
CREATE TABLE Customer (
CustomerID INTEGER UNIQUE NOT NULL,
FirstName VARCHAR(15),
LastName VARCHAR (15),
PRIMARY KEY(CustomerID)
);
2.fire sqlcmd in CLI inside folder where you have installed the voltdB.
if you haven't set the path then you have to type /bin/sqlcmd.
After firing the command, a simple way to load schema in your voltdB database is by typing /path/to/yourSchemaName.sql; command inside the sqlcmd utility and the schema named yourSchemaName.sql will be imported inside the database.
VoltdB is relational database,so Now you can use all of sql database queries inside this database.
I have one table in SQL server and 5 tables in Teradata.I want to join those 5 table in teradata with sql server table and store result in Teradata table.
I have sql server name but i dont know how to simultaneously run a query both on sql server and teradata.
i want to do this:
sql server table query
Select distinct store
from store_Desc
teradata tables:
select cmp_id,state,sde
from xyz
where store in (
select distinct store
from sql server table)
You can create a table (or a volatile table if you do not have write privileges) to do this. Export result from SQL Server as text or into the language of your choice.
CREATE VOLATILE TABLE store_table (
column_1 datatype_1,
column_2 datatype_2,
...
column_n datatype_n);
You may need to add ON COMMIT PRESERVE ROWS before the ; to the above depending on your transaction settings.
From a language you can loop the below or do an execute many.
INSERT INTO store_table VALUES(value_1, value_2, ..., value_n);
Or you can use the import from text using Teradata SQL Assistant by going to File and selecting Import. Then execute the below and navigate to your file.
INSERT INTO store_table VALUES(?, ?, ..., n);
Once you have inserted your data you can query it by simply referencing the table name.
SELECT cmp_id,state,sde
FROM xyz
WHERE store IN(
SELECT store
FROM store_table)
The DISTINCT function is most easily done on export from SQL Server to minimize the rows you need to upload.
EDIT:
If you are doing this many times you can do this with a script, here is a very simple example in Python:
import pyodbc
con_ss = pyodbc.connect('sql_server_odbc_connection_string...')
crs_ss = con_ss.cursor()
con_td = pyodbc.connect('teradata_odbc_connection_string...')
crs_td = con_td.cursor()
# pull data for sql server
data_ss = crs_ss.execute('''
SELECT distinct store AS store
from store_Desc
''').fetchall()
# create table in teradata
crs_td.execute('''
CREATE VOLATILE TABLE store_table (
store DEC(4, 0)
) PRIMARY INDEX (store)
ON COMMIT PRESERVE ROWS;''')
con_td.commit()
# insert values; you can also use an execute many, but this is easier to read...
for row in data_ss:
crs_td.execute('''INSERT INTO store_table VALUES(?)''', row)
con_td.commit()
# get final data
data_td = crs_td.execute('''SELECT cmp_id,state,sde
FROM xyz
WHERE store IN(
SELECT store
FROM store_table);''').fetchall()
# from here write to file or whatever you would like.
Is fetching data from the Sql Server through ODBC an option?
The best option may be to use Teradata Parallel Transporter (TPT) to fetch data from SQL Server using its ODBC operator (as a producer) combined with Load or Update operator as the consumer to insert it into an intermediate table on Teradata. You must then perform rest of the operations on Teradata. For the rest of the operations, you can use BTEQ/SQLA to store the results in the final Teradata table. You can also put the same SQL in TPT's DDL operator instead of BTEQ/SQLA and get it done in a single job script.
To allow use of tables residing on separate DB environments (in your case SQL-Server and Teradata) in a single select statement, Teradata has recently released Teradata Query Grid. But I'm not sure about exact level of support for SQL-Server and it will involve licensing hassle and quite a learning curve to do this simple job.
I have one table named "Staff" in access and also have this table(same name) in SQL 2008.
Both table have thousands of records. I want to merge records from the access table to sql table without affecting the existing records in sql. Normally, I just export using OCBC driver and that works fine if that table doesn't exist in sql server. Please advise. Thanks.
A simple append query from the local access table to the linked sql server table should work just fine in this case.
So, just drop in the first (from) table into the query builder. Then change the query type to append, and you are prompted for the append table name.
From that point on, just drop in the columns you want (do not drop in the PK column, as they need not be used nor transferred in this case).
You can also type in the sql directly in the query builder. Either way, you will wind up with something like:
INSERT INTO dbo_custsql
( ADMINID, Amount, Notes, Status )
SELECT ADMINID, Amount, Notes, Status
FROM custsql1;
This may help: http://www.red-gate.com/products/sql-development/sql-compare/
Or you could write a simple program to read from each data set and do the comparison, adding, updating, and deleting, etc.
I want to generate the database script of sql server 2008. I want to generate only updates from particular date. how to do this?
Your question is kind of unclear. Do you want to generate a database script that creates the tables or inserts data?
If it is data you can create selects that outputs what would be valid inserts:
create table test (a int, b int, c int);
select 'insert into test (a,b,c) values
('+convert(varchar, a)+','+convert(varchar, b)+','+convert(varchar, c)+');'
from test
On the select you could add a where clause where you only obtain data from a given date.
Edit:
It looks like someone has discussed how to find changes between databases already on some other discussion forum. Have a look at:
http://www.sqlteam.com/Forums/topic.asp?TOPIC_ID=27234