In my codeigniter3 project, I have 3 tables with many-to-many relationship:
table 1: jobposts (id, title, desc)
table 2: locationitems (id, name)
Table 3: jobpostlocation (jobpost_id, locationitem_id)
Questions: How do I build SQL query to UPDATE records in in jobpostlocation table, when I update jobposts table?
SQL query statement is much appreciated. Thank you
$jobposts = array('title' => $title,'desc' => $desc, );
$this->db->where('id',$idNo);
$this->db->update('jobposts',$arrayName);
$jobpostlocation = array('locationitem_id' => $locationitem_id );
$this->db->where('jobpost_id',$idNo);
$this->db->update('jobposts',$jobpostlocation);
Related
So I'd like make a query that shows all the datasets from a project, and the number of tables in each one. My problem is with the number of tables.
Here is what I'm stuck with :
SELECT
smt.catalog_name as `Project`,
smt.schema_name as `DataSet`,
( SELECT
COUNT(*)
FROM ***DataSet***.INFORMATION_SCHEMA.TABLES
) as `nbTable`,
smt.creation_time,
smt.location
FROM
INFORMATION_SCHEMA.SCHEMATA smt
ORDER BY DataSet
The view INFORMATION_SCHEMA.SCHEMATA lists all the datasets from the project the query is executed, and the view INFORMATION_SCHEMA.TABLES lists all the tables from a given dataset.
The thing is that the view INFORMATION_SCHEMA.TABLES needs to have the dataset specified like this give the tables informations : dataset.INFORMATION_SCHEMA.TABLES
So what I need is to replace the *** DataSet*** by the one I got from the query itself (smt.schema_name).
I am not sure if I can do it with a sub query, but I don't really know how to manage to do it.
I hope I'm clear enough, thanks in advance if you can help.
You can do this using some procedural language as follows:
CREATE TEMP TABLE table_counts (dataset_id STRING, table_count INT64);
FOR record IN
(
SELECT
catalog_name as project_id,
schema_name as dataset_id
FROM `elzagales.INFORMATION_SCHEMA.SCHEMATA`
)
DO
EXECUTE IMMEDIATE
CONCAT("INSERT table_counts (dataset_id, table_count) SELECT table_schema as dataset_id, count(table_name) from ", record.dataset_id,".INFORMATION_SCHEMA.TABLES GROUP BY dataset_id");
END FOR;
SELECT * FROM table_counts;
This will return something like:
can anyone help me I'm new to django so I don't know how to make sql queries into django code.
my sql table is :
select * from mangazones.mangabank_comic_banks;
the table image:
sql table image
then for second row query :
WITH added_row_number AS (SELECT comic_chapter,comic_english_name_id, row_number() OVER(PARTITION BY comic_english_name_id ORDER BY comic_chapter DESC) AS row_num FROM mangazones.mangabank_comic_banks) SELECT * FROM added_row_number WHERE row_num = 2;
I get table:
seond row table
I want second row table query in django also.
Can anyone please help me?
You can get the latest or latest 2nd value in Django model:
If you want to filter using primary key:
latest_second = Model_Name.objects.filter().order_by('-pk')[1]
If you have created date and time you can do it such way:
latest_second = Model_Name.objects.filter().order_by('-created')[1]
here, filter() is for filtering certain items.
if you don't want to filter items then you can use:
latest_second = Model_Name.objects.all().order_by('-pk')[1]
I got lots of example to append/overwrite table in sql from AZ Databricks Notebook. But no single way to directly update, insert data using query or otherway.
ex. I want to update all row where (identity column)ID = 1143, so steps which I need to taken care are
val srMaster = "(SELECT ID, userid,statusid,bloburl,changedby FROM SRMaster WHERE ID = 1143) srMaster"
val srMasterTable = spark.read.jdbc(url=jdbcUrl, table=srMaster,
properties=connectionProperties)
srMasterTable.createOrReplaceTempView("srMasterTable")
val srMasterTableUpdated = spark.sql("SELECT userid,statusid,bloburl,140 AS changedby FROM srMasterTable")
import org.apache.spark.sql.SaveMode
srMasterTableUpdated.write.mode(SaveMode.Overwrite)
.jdbc(jdbcUrl, "[dbo].[SRMaster]", connectionProperties)
Is there any other sufficient way to achieve the same.
Note : Above code is also not working as SQLServerException: Could not drop object 'dbo.SRMaster' because it is referenced by a FOREIGN KEY constraint. , so it look like it drop table and recreate...not at all the solution.
You can use insert using a FROM statement.
Example: update values from another table in this table where a column matches.
INSERT INTO srMaster
FROM srMasterTable SELECT userid,statusid,bloburl,140 WHERE ID = 1143;
or
insert new values to rows where one of the existing column value matches
UPDATE srMaster SET userid = 1, statusid = 2, bloburl = 'https://url', changedby ='user' WHERE ID = '1143'
or just insert multiple values
INSERT INTO srMaster VALUES
(1, 10, 'https://url1','user1'),
(2, 11, 'https://url2','user2');
In SQL Server, you cannot drop a table if it is referenced by a FOREIGN KEY constraint. You have to either drop the child tables before removing the parent table, or remove foreign key constraints.
For a parent table, you can use the below query to get foreign key constraint names and the referencing table names:
SELECT name AS 'Foreign Key Constraint Name',
OBJECT_SCHEMA_NAME(parent_object_id) + '.' + OBJECT_NAME(parent_object_id) AS 'Child Table'
FROM sys.foreign_keys
WHERE OBJECT_SCHEMA_NAME(referenced_object_id) = 'dbo' AND
OBJECT_NAME(referenced_object_id) = 'PARENT_TABLE'
Then you can alter the child table and drop the constraint by its name using the below statement:
ALTER TABLE dbo.childtable DROP CONSTRAINT FK_NAME;
I was trying to implement bayesian average logic in doctrine and symfony.
I have basic native Mysql query like this:
Create View `ratings` AS
SELECT
restaurant_id,
(SELECT count(restaurant_id) FROM ratings) / (SELECT count(DISTINCT restaurant_id) FROM ratings) AS avg_num_votes,
(SELECT avg(rating) FROM ratings) AS avg_rating,
count(restaurant_id) as this_num_votes,
avg(rating) as this_rating
FROM
ratings
GROUP BY
restaurant_id
SELECT
restaurant_id,
((avg_num_votes * avg_rating) + (this_num_votes * this_rating)) / (avg_num_votes + this_num_votes) as real_rating
FROM `ratings`
This query creates table view from where we are retrieving records.
From some documents I came to know that we can't create view in Doctrine. So another option is to create temporary table. How we can create temp table with different structure.
Referring : http://shout.setfive.com/2013/11/21/doctrine2-using-resultsetmapping-and-mysql-temporary-tables/
// Add the field info for each column/field
foreach( $classMetadata->fieldMappings as $id => $obj ){
$rsm->addFieldResult('u', $obj["columnName"], $obj["fieldName"]);
// I want to crate new fields to store avg rating etc.
}
How we can implement this in Doctrine and Symfony?
I have one table table1 (id, name, surname, ssn) and a view1 (id, ssn) and here is my update clause
update table1 set
ssn=v.ssn
from table1 t,view v
where t.id=v.id
However I get syntax error sql code -201, does anybody knows what is the problem?
Can you try:
UPDATE table1 SET ssn=(SELECT ssn FROM view WHERE table1.id=view.id)
PS You use strange names: table1, view. They say nothing about data in those tables/views. I hope this is only for this question.
You can use the MERGE statement.
But this depends the version of the Informix engine are you working (needs version 11.50 for this answer work).
Check this other similar question/answer answer for more information.
MERGE INTO table1 as t1
USING table2 as t2
ON t1.ID = t2.ID
WHEN MATCHED THEN UPDATE set (t1.col1, t1.col2) = (t2.col1, t2.col2);