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MYSQL QUESTIONS

Group or eliminate duplicates fields in columns
Group or eliminate duplicates fields in columns
wish of those help You can use case when first record of group display the value, otherwise empty string:
TAG : mysql
Date : October 13 2020, 02:00 AM , By : Alma Dosbergen
How to get latest data inserted in mySQL?
How to get latest data inserted in mySQL?
it should still fix some issue Give this code a try.select l.* from table l inner join ( select date_input as latest from table group by id order by date_input desc ) r on l.date_input= r.latest and l.id= r.id order by date_input desc
TAG : mysql
Date : October 13 2020, 02:00 AM , By : Osama Eltayar
How to reduce select * from table_name query execution time for table with 200k+ records?
How to reduce select * from table_name query execution time for table with 200k+ records?
Any of those help Here's the thing: Your query has no filtering predicates (no WHERE clause). Then you are selecting all the rows of the table. Your query has a * instead of a subset of columns. Therefore, it's selecting all the columns of the table.
TAG : mysql
Date : October 13 2020, 02:00 AM , By : Michael Henriquez
How to only add specific value to a column?
How to only add specific value to a column?
fixed the issue. Will look into that further How do I make sure it only concat one value once it already got value? For example is the message already got the text "cat", how do I make the "dog" doesnt include? , Use a CASE expression:
TAG : mysql
Date : October 13 2020, 01:00 AM , By : mst
How does an incoming request to a nodejs server get handled when the event loop is waiting for a DB operation
How does an incoming request to a nodejs server get handled when the event loop is waiting for a DB operation
it helps some times You are right, while node waits for the database query to return, it will handle any incoming requests and start that requests database call before the first one finishes.The easiest way to prevent this IMO would be to use queues.
TAG : mysql
Date : October 13 2020, 12:00 AM , By : Farneous
SQL query to get count of unique combinations in the table - MySql
SQL query to get count of unique combinations in the table - MySql
Hope that helps I think you might be after something that deals with combinations rather than permutations i.e 1, 2 and 2, 1 should be treated as the same combination. If this is the case you can use a case expression to make sure that c1 is always t
TAG : mysql
Date : October 13 2020, 12:00 AM , By : aqib qayyum
Can I speed up this VBA function that queries an (AWS) mysql db?
Can I speed up this VBA function that queries an (AWS) mysql db?
Hope that helps I've written a function (see below) that queries an external MySQL database that's set up on AWS and returns a single value. It works fine - just like I wanted it to, really - except that it's fairly slow. If you're just using the fun
TAG : mysql
Date : October 12 2020, 10:00 PM , By : Tom Cassius
Do we need to pass only int values for the 'INT' type data in MYSQL select query?
Do we need to pass only int values for the 'INT' type data in MYSQL select query?
wish help you to fix your issue This happend because the implict convdrsione performed by SQL .. and in each case the firts char (or set of chars ) is valid number
TAG : mysql
Date : October 12 2020, 10:00 PM , By : J.dongha
Why am I getting error at line 1 on Create Table
Why am I getting error at line 1 on Create Table
like below fixes the issue Don't use single quotes ' for the fields names, use backticks ` or nothing at all:
TAG : mysql
Date : October 12 2020, 09:00 PM , By : Josuepaulidinho
How can I find the location visited by all employees in this sql table?
How can I find the location visited by all employees in this sql table?
To fix the issue you can do You need to get the count of all distinct employees from each region and get the regions that have the total number of employees equal to the ones present in the employee table. Your query should look something like this:
TAG : mysql
Date : October 12 2020, 08:00 PM , By : wwwwww7
Liquibase commits changeset partially
Liquibase commits changeset partially
fixed the issue. Will look into that further It is not Liquibase that is committing a changeset partially. I have worked with many databases and a basic concept for all the databases I used, is that a transaction combines data modifications (DML) onl
TAG : mysql
Date : October 12 2020, 05:00 PM , By : Mr. h
sql query customer who ordered more than 15 times
sql query customer who ordered more than 15 times
I wish this helpful for you how to get list of customers who ordered more than 15times. i have customerId , orderId , orderValue , orderDate. , You can try below -
TAG : mysql
Date : October 12 2020, 05:00 PM , By : YoungChow
At what time will MySQL execute events that are scheduled every DAY?
At what time will MySQL execute events that are scheduled every DAY?
wish help you to fix your issue Not specifying STARTS is the same as using STARTS CURRENT_TIMESTAMP—that is, the action specified for the event begins repeating immediately upon creation of the event.
TAG : mysql
Date : October 12 2020, 04:00 PM , By : Kishor Kumar
Same execution path, data and schematics; different query times
Same execution path, data and schematics; different query times
this one helps. A guess (pending more information requested in Comments)... innodb_buffer_pool_size is smaller than the Data_length (see SHOW TABLE SIZE offers), and the 15K rows are scattered around the table. This could lead to hitting the disk ins
TAG : mysql
Date : October 12 2020, 04:00 PM , By : Trường Nguyễn
Can someone tell me why this query isn't working please?
Can someone tell me why this query isn't working please?
around this issue Can someone tell me why this query isn’t working please? , Your OR is likely what's messing things up.
TAG : mysql
Date : October 12 2020, 03:00 PM , By : Interesting-Diva
MySQL - Why is Safe Update Mode blocking this UPDATE command?
MySQL - Why is Safe Update Mode blocking this UPDATE command?
it should still fix some issue You can work around this error by making the column a KEY column. In other words, create an index (aka key) on the column.
TAG : mysql
Date : October 12 2020, 01:00 PM , By : Riccardo
Is there any collation to differentiate 'е' and 'ё' in case insensitive way?
Is there any collation to differentiate 'е' and 'ё' in case insensitive way?
This might help you If you want a collation that is accent sensitive but case insensitive, use utf8mb4_0900_as_ci.From MySQL :: MySQL 8.0 Release Notes :: Changes in MySQL 8.0.2 (2017-07-17, Development Milestone):
TAG : mysql
Date : October 12 2020, 10:00 AM , By : DEEPU ramachandran
How to grant all privileges to specific user to remote ip
How to grant all privileges to specific user to remote ip
Any of those help Try using CREATE USER uber@111.111.111.111 before you grant permissions.
TAG : mysql
Date : October 12 2020, 10:00 AM , By : Nikew
distributed crawler and consistency
distributed crawler and consistency
wish help you to fix your issue Lock a row so another process cannot update it.
TAG : mysql
Date : October 12 2020, 09:00 AM , By : darcy
How to use mysql in node with Typescript
How to use mysql in node with Typescript
To fix the issue you can do Background , it will return Object Array :
TAG : mysql
Date : October 12 2020, 09:00 AM , By : houss miled
How to display a MySQL table completely?
How to display a MySQL table completely?
I hope this helps . I am trying to display the whole contents of a MySQL table using PHP. I want the code to display the table completely and it should work for any table that has been created in my database. , You mentioned
TAG : mysql
Date : October 12 2020, 08:00 AM , By : Paweł Gielmuda
Can create procedure without using delimiter in MySQL?
Can create procedure without using delimiter in MySQL?
I wish this help you If the procedure is just a single statement, you don't need to change the delimiter.
TAG : mysql
Date : October 12 2020, 08:00 AM , By : Indira
INSERT INTO using data from other table causing ERROR 1064
INSERT INTO using data from other table causing ERROR 1064
this one helps. My command for INSERT INTO was: , remove values and change your query to :
TAG : mysql
Date : October 12 2020, 06:00 AM , By : saurabh
MySQL - update with inner join is creating nulls
MySQL - update with inner join is creating nulls
it fixes the issue I would say the simplest solution would be to add a WHERE to your query to specifically rule out rows that don't have a price in the allStocks table. Doing it this way adds to the readability of the query as compared to using somet
TAG : mysql
Date : October 12 2020, 05:00 AM , By : Dhuvad Parv
Should i rather use a subquery or a combined WHERE?
Should i rather use a subquery or a combined WHERE?
hop of those help? You can use the EXPLAIN keyword to see exactly how each query is executed.I'd say it's almost a definite that these two will execute identically.
TAG : mysql
Date : October 12 2020, 05:00 AM , By : Muneeb
How do I create views in dolphindb?
How do I create views in dolphindb?
With these it helps DolphinDB has similar concept, function view. A function view can have parameters.
TAG : mysql
Date : October 12 2020, 04:00 AM , By : AxsPlayer
How to efficiently get a entry with highest version in mysql table
How to efficiently get a entry with highest version in mysql table
I hope this helps you . I need to get an entry from mysql with a given id but the version should be maximum. , In mysql you could use order by and limit 1 for a single id
TAG : mysql
Date : October 12 2020, 03:00 AM , By : Bilal
Inserting Data into a table
Inserting Data into a table
it fixes the issue To debug this, first do just the select part, don’t do the insert part.I bet the problem is around how you specify the date. Try dropping that out of the query and see what you get.
TAG : mysql
Date : October 12 2020, 02:00 AM , By : Karthik S Kumar
Delete from row to row in phpadmin
Delete from row to row in phpadmin
Hope that helps I have a table with many rows and I want want to delete from row to row but I do know the right comand. , if the rows are in ordered sequence you could use between
TAG : mysql
Date : October 11 2020, 11:00 PM , By : Parham
Why are parentheses used in JOIN USING clauses
Why are parentheses used in JOIN USING clauses
Hope this helps From the following code example, why do I need to use parentheses () in the JOIN clauses, such as in JOIN PUBLISHER USING (Publisher_Code)? , To avoid ambiguity. Let's say you did:
TAG : mysql
Date : October 11 2020, 09:00 PM , By : H'asan A'li Y'ağız
Rewrite MySQL query and make it short
Rewrite MySQL query and make it short
I hope this helps . Can someone please help me simplify the following MySQL query. The query works perfectly fine, but I just want to simplify the query and make it to read easily. , I think you can use payment_code = '123456789' condition directly.
TAG : mysql
Date : October 11 2020, 08:00 PM , By : Emily Mitchell
Can 1 primary id link to multiple ids in one table?
Can 1 primary id link to multiple ids in one table?
I hope this helps you . This is a common misunderstanding with foreign keys. If you think you need to store two IDs in one record's foreign key, your foreign key is in the wrong place.In your case, if a match can have many bettors, and a bettor can h
TAG : mysql
Date : October 11 2020, 07:00 PM , By : carmine2581
Sequelize raw queries TextRow and getting data out of it
Sequelize raw queries TextRow and getting data out of it
around this issue When I tried this, "data" was an array of two objects, each being the query result. So, the properties can be accessed by using index [0].... e.g.
TAG : mysql
Date : October 11 2020, 06:00 PM , By : liberwyrm
Comparing the contents of two csv files, where the relation between the two files is specified in a third file?
Comparing the contents of two csv files, where the relation between the two files is specified in a third file?
it should still fix some issue I have two files with sales data, and I want to validate whether the sales numbers in the first file are the same as the sales numbers in the second file. But the product ID used in each file are different. I do have a
TAG : mysql
Date : October 11 2020, 06:00 PM , By : Roland Chambers
How to write normal sql queries inside controller in laravel
How to write normal sql queries inside controller in laravel
will help you Welcome to StackOverflow.If you want to execute raw SQL rather than using a query builder, you can try:
TAG : mysql
Date : October 11 2020, 05:00 PM , By : William Oma
MySql query between range values(single record)
MySql query between range values(single record)
it should still fix some issue I think you can optimize your table structure, else it will take a lot of time to get data when the number of records in the table is large.try implementing the below structure it will be easy.
TAG : mysql
Date : October 11 2020, 05:00 PM , By : John A
Set length conditions on text column in MySQL table
Set length conditions on text column in MySQL table
this one helps. if your purpose is storageYou cannot set a minimum length for a column in MySQL.
TAG : mysql
Date : October 11 2020, 05:00 PM , By : Allen
Mysql order of sorting
Mysql order of sorting
I wish this helpful for you You have to handle NULL values in this cases. there is few ways to handle NULL values. you can change the default value to some number which is appropriate for your use, in this case, NULL values will be disappeared and yo
TAG : mysql
Date : October 11 2020, 05:00 PM , By : Osama Musaffer
SQL Query With Between ,AND & OR in Where Clauses Not Given Correct Answers
SQL Query With Between ,AND & OR in Where Clauses Not Given Correct Answers
wish of those help , You need parentheses for the OR condition.
TAG : mysql
Date : October 11 2020, 04:00 PM , By : Fredy Romero Sam
ER_PARSE_ERROR: You have an error in your SQL syntax;
ER_PARSE_ERROR: You have an error in your SQL syntax;
I wish did fix the issue. Why isn't it working? I want download txt and save in a database. , Replace
TAG : mysql
Date : October 11 2020, 04:00 PM , By : Dibakar Das
Query the list of CITY names from STATION that do not start with vowels and do not end with vowels. Your result cannot c
Query the list of CITY names from STATION that do not start with vowels and do not end with vowels. Your result cannot c
will be helpful for those in need https://dev.mysql.com/doc/refman/8.0/en/regexp.html'NOT REGEXP' is Negation of REGEXP,
TAG : mysql
Date : October 11 2020, 11:00 AM , By : fatin haziqah
how to get rows with time for each minute for last 30 minutes
how to get rows with time for each minute for last 30 minutes
it fixes the issue , For the count per minute the solution doesn't need the sequence:
TAG : mysql
Date : October 11 2020, 11:00 AM , By : Surya
MYSQL - join 2 tables - sort in time
MYSQL - join 2 tables - sort in time
I wish this help you In my database I have 2 Tables. The first Table (t1) contain general information (id, address etc.). The second Table (t2) contains measurements (id, timestamp, measurement value). , try to find a bigger time, if you can't you ha
TAG : mysql
Date : October 11 2020, 10:00 AM , By : 房新国
SQL code to select records where field_A matches the field_A value of a certain field_B value
SQL code to select records where field_A matches the field_A value of a certain field_B value
it should still fix some issue I have this table , You can use a subquery:
TAG : mysql
Date : October 11 2020, 10:00 AM , By : Jieyi
How to model Amazon Redshift external table for changing column structure?
How to model Amazon Redshift external table for changing column structure?
will be helpful for those in need Actually, if you use redshift spectrum / athena you may be OK!Adding columns - is fine - just run the glue crawler and the new column will be available
TAG : mysql
Date : October 11 2020, 10:00 AM , By : bobby
How to insert system's Date into Table
How to insert system's Date into Table
hop of those help? Date is date, there is no need to convert it to string and then rely on implicit conversion back to date:
TAG : mysql
Date : October 11 2020, 09:00 AM , By : Andrew Bagwell
Aws lambda function too many connection issue rds
Aws lambda function too many connection issue rds
With these it helps It's complicated to know exactly what's going on, my first guess always revolves on setting context.callbackWaitsForEmptyEventLoop = false and storing the connection outside the function scope - both which you've correctly done.Wi
TAG : mysql
Date : October 11 2020, 09:00 AM , By : kevinCH
MySQL ORDER BY field with a toggle
MySQL ORDER BY field with a toggle
may help you . First order by field1. Then order by compare descending, to get old before new.
TAG : mysql
Date : October 11 2020, 07:00 AM , By : Wally_Hitchcock
In Mysql How to fetch distinct row value from a column1 and sum(column 2 row value) group by invoice number
In Mysql How to fetch distinct row value from a column1 and sum(column 2 row value) group by invoice number
Hope that helps Your subquery doesn't make any sense as it will always be true for all rows.It looks like you just want to group by lgb_invoice and lgb_gst and sum lgb_gst_amt.
TAG : mysql
Date : October 11 2020, 06:00 AM , By : Puzzled
How do i use and with multiple or condition?
How do i use and with multiple or condition?
it should still fix some issue Depending on your collation, this particular query can be written like this:
TAG : mysql
Date : October 11 2020, 05:00 AM , By : Mohammed Elbhery
How to fix 'The server requested authentication method unknown to the client [caching_sha2_password]' on docker compose?
How to fix 'The server requested authentication method unknown to the client [caching_sha2_password]' on docker compose?
like below fixes the issue Your command is right, the issue appears because you have defined the command key two times, and the second one is overriding the first one. Instead you should define it only once and like this:command: --default-authentica
TAG : mysql
Date : October 11 2020, 05:00 AM , By : mounika
Aggregate query with distinct subquery kills every connection
Aggregate query with distinct subquery kills every connection
wish helps you This query ( from any client, cli, workbench, dbeaver, php library ) completely kills every single connection on the server in mysql 8.0.16, runs as expected on 8.0.15. , It looks that the problem is DISTINCT(most likely a bug):
TAG : mysql
Date : October 11 2020, 04:00 AM , By : user15401
Importing .bak from MSSQL into MySQL database
Importing .bak from MSSQL into MySQL database
Hope that helps You cannot. MS SQL Server backups are proprietary to MS SQL Server and cannot be used with any other RDBMS. You will need to restore this backup to SQL Server, then use an additional tool to transfer the data from SQL Server into MySQ
TAG : mysql
Date : October 11 2020, 01:00 AM , By : don lei
How to fix "FUNCTION doesnt exist" error in mysql?
How to fix "FUNCTION doesnt exist" error in mysql?
hop of those help? Don't put the space in HAVING clause between COUNT and (Try this:
TAG : mysql
Date : October 11 2020, 12:00 AM , By : K Wheddon
How to get actual index number of rows in MySQL when using Where clause
How to get actual index number of rows in MySQL when using Where clause
may help you . Just to state the obvious, that is already said: Relational database engines such as MySQL do not have row numbers, like an Excel sheet would have.
TAG : mysql
Date : October 10 2020, 10:00 PM , By : shareef khan
SQL Table Relationship
SQL Table Relationship
should help you out No, you do not have the right tables. Let me give you an example with users and departments. You want three tables for these:
TAG : mysql
Date : October 10 2020, 10:00 PM , By : Rattapong Kromket
Invalid COLUMN in the select list because it is not contained in either an aggregate function or the GROUP BY clause
Invalid COLUMN in the select list because it is not contained in either an aggregate function or the GROUP BY clause
should help you out column name should be also in group by: select count(*), name from tbl_emp_info group by dept, name;All not agregated and columns that you try to show have to be in group by.
TAG : mysql
Date : October 10 2020, 09:00 PM , By : lichiestro
How to write an SQL query to fetch the id in a column that has all the required data in some other column?
How to write an SQL query to fetch the id in a column that has all the required data in some other column?
With these it helps Using GROUP BY and HAVING COUNT(DISTINCT names), you can get the expected result:
TAG : mysql
Date : October 10 2020, 08:00 PM , By : miguel machado
How to get 4-byte emojis to store correctly in mysql 5.7?
How to get 4-byte emojis to store correctly in mysql 5.7?
fixed the issue. Will look into that further In the end it ended up being legacy code doing "SET NAMES UTF8" overriding the database.yml configuration. Really macOS Mojave terminal was throwing me for a loop because it doesn't support the display of
TAG : mysql
Date : October 10 2020, 07:00 PM , By : Priyanka Gupta
How to create an in-memory database for PHPUnit testing?
How to create an in-memory database for PHPUnit testing?
Any of those help I'm a newcomer to PHPUnit (and unit testing in general). I want to work on a test suite that developers can run locally, but can also be run in our integration system (Codeship). I understand that it is possible to use an in-memory
TAG : mysql
Date : October 10 2020, 07:00 PM , By : Ruibo Wang

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