This query does what I need, return a list of data from a widget in several tables from a Wordpress Multi Site database.
There must be an easier way to do this. I have 30 tables I need to include, how can I get some type of loop to just return option value from all wp_n_option tables?
SELECT option_value
FROM `wp_options`
WHERE option_name = 'widget_thin_search'
UNION
SELECT option_value
FROM `wp_3_options`
WHERE option_name = 'widget_thin_search'
UNION
SELECT option_value
FROM `wp_4_options`
WHERE option_name = 'widget_thins_search'
INTO OUTFILE '/tmp/result.csv'
Edit: As Brandon pointed out, if it was a static 30 tables, I could build the query. However, the tables will increase as time goes on.
You could create a table with one column containing table names. Then create a T-SQL proc to loop through those table names and construct a query string resembling what you have in your example. Then run that query string with the exec command.
Just note that UNION removes duplicates whereas UNION ALL does not. That may not be an issue for you but I just wanted to point it out.
Related
I have a look-up table containing a list of fully qualified table paths in a Big Query table called all_tables. For example
|table_list|
|----------|
|project_name.dataset_name1.table_1|
|project_name.dataset_name2.table_1|
|project_name.dataset_name3.table_1|
|project_name.dataset_name4.table_1|
|project_name.dataset_name5.table_1|
I am trying to iterate through these tables to pull out elements I need for another procedure using the for-in syntax in Big Query. This is a simplified version of the query I am using
```
FOR table IN (select * from my_project.my_dataset.all_tables)
DO
select * from table;
END FOR;
```
This isn't working. It picks up the list of tables correctly, but when it substitutes the dataset name in the line 3 select statement, it says
**Invalid value: Table "table" must be qualified with a dataset (e.g. dataset.table)**
I know what the error is, but I am not sure how to make it 'see' the value of table as a table path.
All paths are correct, and I am doing it this way as I am querying multiple tables across multiple datasets for a table creation query.
You should a dynamic sql to refer the table name as a variable, so consider below query:
FOR table IN (select * from my_project.my_dataset.all_tables)
DO
EXECUTE IMMEDIATE FORMAT("""
SELECT * FROM %s;
""", table.table_list);
END FOR;
my query just runs and doesnt execute, what is wrong. work on oracle sql developer, company server
CREATE TABLE voice2020 AS
SELECT
to_char(SDATE , 'YYYYMM') as month,
MSISDN,
SUM(CH_MONEY_SUBS_DED)/100 AS AIRTIME_VOICE,
SUM(CALLDURATION/60) AS MIN_USAGE,
sum(DUR_ONNET_OOB/60) as DUR_ONNET_OOB,
sum(DUR_ONNET_IB/60) as DUR_ONNET_IB,
sum(DUR_ONNET_FREE/60) as DUR_ONNET_FREE,
sum(DUR_OFFNET_OOB/60) as DUR_OFFNET_OOB,
sum(DUR_OFFNET_IB/60) as DUR_OFFNET_IB,
sum(DUR_OFFNET_FREE/60) as DUR_OFFNET_FREE,
SUM(case when sdate < to_date('20190301','YYYYMMDD')
then CH_MONEY_PAID_DED-nvl(CH_MONEY_SUBS_DED,0)-REV_VOICE_INT-REV_VOICE_ROAM_OUTGOING-REV_VOICE_ROAM_Incoming
else (CH_MONEY_OOB-REV_VOICE_INT-REV_VOICE_ROAM_OUTGOING-REV_VOICE_ROAM_Incoming) end)/100 AS VOICE_OOB_SPEND
FROM CCN.CCN_VOICE_MSISDN_MM#xdr1
where MSISDN IN ( SELECT MSISDN FROM saayma_a.BASE30112020) --change date
GROUP BY
MSISDN,
to_char(SDATE , 'YYYYMM')
;
This is a performance issue. Clearly the query driving your CREATE TABLE statement is taking too long to return a result set.
You are querying from a table in a remote database (CCN.CCN_VOICE_MSISDN_MM#xdr1) and then filtering against a local table (saayma_a.BASE30112020) . This means you are going to copy all of that remote table across the network, then discard the records which don't match the WHERE clause.
You know your data (or at least you should know it): does that sound efficient? If you're actually discarding most of the records you should try to filter CCN_VOICE_MSIDN_MM in the remote database.
If you need more advice you need to provide more information. Please read this post about asking Oracle tuning questions on this site, then edit your question to include some details.
You are executing CTAS (CREATE TABLE AS SELECT) and the purpose of this query is to create the table with data which is generated via this query.
If you want to just execute the query and see the data then remove first line of your query.
-- CREATE TABLE voice2020 AS
SELECT
.....
Also, the data of your actual query must be present in the voice2020 table if you have already executed it once.
Select * from voice2020;
Looks like you are trying to copying the data from one table to another table, Can you once create the table if it's not created and then try this statement.
insert into target_table select * from source_table;
So the problem is that I have three huge table with same structure, and I need to show the results of one of them depending on result from another query.
So my order table looks like that:
code order
A 0
B 2
C 1
And I need to retrieve data from t_results
My approach (which is working) looks like this:
select *
from t_results_a
where 'A' in (
select code
from t_order
where order = 0
)
UNION ALL
select *
from t_results_b
where 'B' in (
select code
from t_order
where order = 0
)
UNION ALL
select *
from t_results_c
where 'C' in (
select code
from t_order
where order = 0
)
Is there anyway to not scan all three tables, as I am working with Athena so I can't program?
I presume that changing your database schema is not an option.
If it were, you could use one database table and add a CODE column whose value would be either A, B or C.
Basically the result of the SQL query on your ORDER table determines which other database table you need to query. For example, if CODE in table ORDER is A, then you have to query table T_RESULTS_A.
You wrote in your question
I am working with Athena so I can't program
I see that there is both an ODBC driver and a JDBC driver for Athena, so you can program with either .NET or Java. So you could write code that queries the ORDER table and use the result of that query to build another query string to query just the relevant table.
Another thought I had was dynamic SQL. Oracle database supports it. I can create a string containing variables where one variable is the database table name and have Oracle interpret the string as SQL and execute it. I briefly searched the Internet to see whether Athena supports this (as I have no experience with Athena) but found nothing - which doesn't mean to say that it does not exist.
I have these queries:
SELECT *
FROM dbo.GRAUD_ProjectsByCostCategory
select right(CostCategoryId,14) as CostBreak
from dbo.GRAUD_ProjectsByCostCategory
They work well in that they give me the correct data, but I would like to know how to combine the new column CostBreak into the table of results rather than as a separate query result.
An example of the results I get are as below:
Where I want them in the same table
The data is coming from the same table so you should be able to just add that value to your initial query. You do not even have to perform a join to get it:
SELECT name,
description,
project,
CostCategoryId,
right(CostCategoryId,14) as CostBreak
FROM dbo.GRAUD_ProjectsByCostCategory
I need to transform an Oracle SQL statement into a Stored Procedure therefore users with less privileges can access certain data field:
SELECT
info_field, data_field
FROM
table_one
WHERE
some_id = '<id>' -- I need this <id> to be the procedure's parameter
UNION ALL
SELECT
info_field, data_field
FROM
table_two
WHERE
some_id = '<id>'
UNION ALL
SELECT
info_field, data_field
FROM
table_three
WHERE
some_id = '<id>'
UNION ALL
...
Given that I'm no SP expert I've been unable to figure out a good solution to loop through all the involved tables (12 aprox.).
Any ideas would be helpful. Thanks much!
If you just want to restrict users' access you could create a view and grant them select on the view but not the tables:
CREATE VIEW info_and_data AS
SELECT info_field, data_field
FROM table_one
UNION ALL
SELECT info_field, data_field
FROM table_two
UNION ALL
SELECT info_field, data_field
FROM table_three
...
The users could then type:
SELECT info_field, data_field
FROM info_and_data
WHERE some_id = <id>
There are other ways to achieve your goal besides my suggestions below, but I would warn against splitting up data that really belongs in one table just to implement a data access policy that may change in the future.
The simplest solution to limit which table columns a user sees is through views on those tables. Use different views that show or hide specific columns and grant access to those views to different users/roles.
If you don't know in advance which combination of columns a user may be allowed to see, then you could use dynamic sql: You assemble the SQL statment in the stored procedure based on the access privileges of your user (look up from some other table you create to hold this info), meaning that you only include the proper columns in the SELECT portion of your statement. See this document from Orace
for more info.
If you are using Oracle 10g, then you may find this Oracle article interesting. It introduces the topic of the Virtual Private Database, or VPD for short, where you can hide certain rows, or columns or even individual column values depending on who is accessing a table.
Is the expectation that, among all these tables, only one will have a match for a given ID?
If no: You need to explain what you want to do when there are multiple matches.
If yes: You simply do the same SQL query, selecting the result into a variable that you then return.
It would look something like this:
PROCEDURE get_fields( the_id NUMBER,
info_field_out OUT table_one.info_field%TYPE,
data_field_out OUT table_one.data_field%TYPE
)
IS
BEGIN
SELECT info_field, data_field
INTO info_field_out, data_field_out
FROM (
... put your full SQL query here, using 'the_id' as the value to match against ..
);
EXCEPTION
WHEN no_data_found THEN
-- What do you want to do here? Set the outputs to NULL? Raise an error?
WHEN too_many_rows THEN
-- Is this an invalid condition?
END;