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SELECT statement from two dataframes using RMySQL


SELECT statement from two dataframes using RMySQL

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SELECT statement from two dataframes using RMySQL
Tag : string , By : JulianCT
Date : November 28 2020, 01:01 AM


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Inner joining to a select statement where the inner select statement's where clause references the outer select?


Tag : sql , By : user187301
Date : March 29 2020, 07:55 AM
it fixes the issue This is a slimmed down query of my greater problem, but the gist is that I'm trying to inner join to a select where the select is limited by the outer select. Is that possible? I'm getting an error about multipart identifier S.Item and S.SerialNum on the inner select. , Looks like you have your JOIN reference in the wrong place.
SELECT S.Item, S.SerialNum, S.ReceiveDate
FROM SALES S
INNER JOIN 
(
    SELECT W.Item, W.SerialNum, MIN(W.SalesDate) MinSalesDate
    FROM WARRANTY W
    GROUP BY Item, SerialNum
) WW
        ON S.Item = WW.Item 
       AND S.SerialNum = WW.SerialNum
SELECT S.Item, S.SerialNum, S.ReceiveDate, WW.MinSalesDate
FROM SALES S
INNER JOIN 
(
    SELECT W.Item, W.SerialNum, MIN(W.SalesDate) MinSalesDate
    FROM WARRANTY W
    WHERE yourFilter here
    GROUP BY Item, SerialNum
) WW
        ON S.Item = WW.Item 
       AND S.SerialNum = WW.SerialNum

How to select all data but the last week in RMySQL with timestamp?


Tag : mysql , By : user179445
Date : March 29 2020, 07:55 AM
I hope this helps . The name of the table has to come before the data frame you want to write to that table. In the else part of your code, you seem to have the order correct, but in the if part you have BFWeek before tbl.name where it should go after.
> showMethods("dbWriteTable")
Function: dbWriteTable (package DBI)
conn="MySQLConnection", name="character", value="character"
conn="MySQLConnection", name="character", value="data.frame"

RMySQL Syntax Error on "DROP INDEX" statement


Tag : mysql , By : cashshadow
Date : March 29 2020, 07:55 AM
it should still fix some issue Execute the query in 2 parts. first part create table and second part drop the index. for ex-
query <- "CREATE TEMPORARY TABLE temporary_table LIKE test.helloworld;"
rs <- dbSendQuery(con, query) #Where the error occurs

query <- "DROP INDEX `PRIMARY` ON temporary_table;"
rs <- dbSendQuery(con, query) #Where the error occurs
<?php
$mysqli = new mysqli("localhost", "root", "root", "test");
$result = $mysqli->query("CREATE TEMPORARY TABLE `temporary_table` LIKE t;");
printf("Errormessage: %s\n", $mysqli->error);
$result = $mysqli->query(" DROP INDEX `PRIMARY` ON temporary_table;");
#$result = $mysqli->query("DROP table temporary_table;");
printf("Errormessage: %s\n", $mysqli->error);
?>
root@smart:/var/www# php test.php
Errormessage: 
Errormessage:
<?php
// mysqli
$mysqli = new mysqli("localhost", "root", "root", "test");
$result = $mysqli->query("CREATE TEMPORARY TABLE `temporary_table` LIKE t;DROP INDEX `PRIMARY` ON temporary_table;");
printf("Errormessage: %s\n", $mysqli->error);
?>
root@smart:/var/www# php test.php
Errormessage: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DROP INDEX `PRIMARY` ON temporary_table' at line 1

SQL: nested select statement - child select reading var from main select statement


Tag : sql , By : Chris Woods
Date : March 29 2020, 07:55 AM
Hope that helps after playing around with the statement, that was the final result that worked for me:-
IF OBJECT_ID('tempdb..#temptbl', 'U') IS NOT NULL
/*Then it exists*/
DROP TABLE #temptbl

declare @totalreq int

select distinct p1.ProductName, p1.TotalQuantity, o1.OrderEventDate, (select SUM(od2.OrderDetailReqQuant)
                from OrderDetailTbl as od2
                inner join OrderTbl as o2
                    on od2.OrderId = o2.OrderId
                where o2.OrderEventDate = o1.OrderEventDate and od2.ProductId = 

                (select p3.ProductId from ProductTbl as p3 where p3.ProductName = p1.ProductName))  as TotalRequiredQuantity
into #temptbl
 from ProductTbl as p1
 inner join OrderDetailTbl as od1
    on p1.ProductID = od1.ProductId
 inner join OrderTbl as o1
    on o1.OrderId = od1.OrderId

    select * from #temptbl
ProductName    |TotalQuantity|OrderEventDate|TotalRequiredQuantity
__________________________________________________________________________
8' Tabel       | 50          | 2019-01-18   |14
Banquet Chairs |400          | 2019-01-17   |2
Banquet Chairs |400          | 2019-01-18   |12
White Chairs   |220          | 2019-01-18   |5 

How to select MySQL version when installing RMySQL in linux


Tag : mysql , By : semicolonth
Date : March 29 2020, 07:55 AM
Any of those help I found the solution by myself. The SSL certificates were not applied in the dbConnect() call. They need to be defined in a mysql.cnf file which is passed to dbConnect() in the default.file parameter:
dbHandle <- dbConnect(
    MySQL(),
    dbname = dbConfig$databaseName,
    host = dbConfig$host,
    port = as.integer(dbConfig$port),
    user = dbConfig$user,
    password = dbConfig$password,
    default.file = dbConfig$configFile
)
host=domain.subdomain.de
port=3306
user=john.doe
password=mypassword
databaseName=my_db
configFile=/staging/config/mysql.cnf
[mysqld]
ssl-ca=/staging/mysql-ssl/ca.pem
ssl-cert=/staging/mysql-ssl/client-cert.pem
ssl-key=/staging/mysql-ssl/client-key.pem
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