Is it possible to create a view and that view to contain table variables for example like this:
create view "USERS_VIEW" as
tt = select * from "UsersTable" where "UserID" in (128,129);
select * from :tt
with READ ONLY;
Table variables are only available in SQLSCRIPT but not in standard SQL.
So, that doesn’t work with CREATE VIEW.
However, it’s possible to create a procedure with a view to access the procedure result set.
To do that use the WITH RESULT VIEW (see documentation) keyword with the CREATE PROCEDURE statement.
Related
I am trying to write a BigQuery script that I can store as a procedure, I would like one of the arguments I pass to be used in the table name that is written out by the script, for example:
DECLARE id STRING;
SET id = '123';
CREATE OR REPLACE TABLE test.id AS(
SELECT * FROM dataset.table
)
However, in this example the table is created with the name id rather than the value of the "id" variable, 123. Is there any way I can dynamically create a table using the value of a declared variable in the BigQuery UI?
Why not just use Execute Immediate with concat if you know the table schema?
EXECUTE IMMEDIATE CONCAT('CREATE TABLE `', id, '` (column_name STRING)');
So far we have officially announced BigQuery scripting document, which is still in Beta phase, leveraging usage of dynamic parameters (variables) as a placeholders for values in SQL queries . However, according to Parameterized queries in BigQuery documentation, query parameters can't be used for SQL object identifiers:
Parameters cannot be used as substitutes for identifiers, column
names, table names, or other parts of the query.
Maybe you can use a wildcard table. You would create a wildcard table with all subtables you want to query and use the WHERE clause to select any subtable you want. Just be careful, the tables must have the same schema.
I am trying to write a BigQuery script that I can store as a procedure, I would like one of the arguments I pass to be used in the table name that is written out by the script, for example:
DECLARE id STRING;
SET id = '123';
CREATE OR REPLACE TABLE test.id AS(
SELECT * FROM dataset.table
)
However, in this example the table is created with the name id rather than the value of the "id" variable, 123. Is there any way I can dynamically create a table using the value of a declared variable in the BigQuery UI?
Why not just use Execute Immediate with concat if you know the table schema?
EXECUTE IMMEDIATE CONCAT('CREATE TABLE `', id, '` (column_name STRING)');
So far we have officially announced BigQuery scripting document, which is still in Beta phase, leveraging usage of dynamic parameters (variables) as a placeholders for values in SQL queries . However, according to Parameterized queries in BigQuery documentation, query parameters can't be used for SQL object identifiers:
Parameters cannot be used as substitutes for identifiers, column
names, table names, or other parts of the query.
Maybe you can use a wildcard table. You would create a wildcard table with all subtables you want to query and use the WHERE clause to select any subtable you want. Just be careful, the tables must have the same schema.
Okay, so I'm a novice at writing stored procedures. I'm trying to perform a function similar to a foreach() you would see in a programming language. Right now I have a temp table populated with the values I'd like to loop through. I would like to (for each value in this table) execute a SQL statement based upon that value. So, here's my pseudocode to illustrate what I'm really after here:
foreach(value in my temp table) {
SELECT * FROM TABLE WHERE column_x = value
}
No I know nothing of stored procedures so how can I get this done? Here's my script so far:
DROP TABLE SESSION.X;
CREATE GLOBAL TEMPORARY TABLE
SESSION.X (
TD_NAME CHAR(30)
);
INSERT INTO
SESSION.X
SELECT DISTINCT
TD_NAME
FROM
DBA.AFFIN_PROG_REPORT
WHERE
TD_NAME IS NOT NULL;
Any help is very much appreciated!
You need, by example, a cursor.
See the example: https://stackoverflow.com/a/4975012/3428749
See the documentation: https://msdn.microsoft.com/pt-br/library/ms180169(v=sql.120).aspx
For database re-architecture I need to get DDL of each table and view in the database(Oracle). I don't want to go to property of each table/view and get SQL out of it in SQL Developer.
I successfully got DDL for table using-
select dbms_metadata.get_ddl('TABLE','Table_name','Schema_Name')
from dual;
But facing problem with VIEW and MVIEW. Could anyone provide commands/keywords for elements other than table.
Also, I want to export the result in an excel file with first column as TableName and second column as DDL.
Try the below query for view:
select text from ALL_VIEWS where upper(view_name) like upper(<view_name>);
For mviews:
select query from ALL_MVIEWS where upper(mview_name) like upper(<mview_name>);
For materialized views use:
select dbms_metadata.get_ddl('MATERIALIZED_VIEW','MView_name','Schema_Name')
from dual;
See all supported object types here: DBMS_METADATA: Object Types
I have a table A with columns 1.Column 1 contains a query select * from tableD;
I need to execute the query inside column1 using single query if possible..How to do this..
Database is netezza.If u provide ans for oracle Db also fine.
This seems Dynamic query problem for me ..
In Oracle you can create a procedure to call this query which is actually stored in a table.
In my knowledge you can not directly run query stored as text.
You need to create a procedure or function where you can call this query as dynamically with execute immediate command.