Databases Forum

I know that `SQL_CALC_FOUND_ROWS` has been deprecated, but I was just wondering if anyone knows why? It was so handy, even if slightly less performant than running the query twice (once with and once without the `LIMIT` clause).

How can I identify and delete unused MySQL indexes? I have a large table that has somehow accumulated way too many indexes over the years, and I'd now like to identify and delete indexes that are no longer used by the application.

I want to run a query, of course more involved, but something roughly similar to: DELETE from table WHERE id IN ( SELECT id FROM table WHERE ... ) Doing that gives me an error message that I can't delete from the same table as I'm selecting from in a …

Our MySQL servers are behind our VPN and do not have public-facing IPs. Is there any benefit to connecting to them securely over SSL? I keep reading that it's recommended, but the only thing I can think of is that it will cause extra latency when establishing a connection?

I ran into a bit of a snag in my code, and I'm trying to make heads or tails as to whether this will work. From within my PHP script, can I write to a database using a MySQL connection in the middle of a transaction with a different connection? …

A script that was working fine on 100 records per batch choked when I fed it 1,000 records. It gave: mysql.connector.errors.OperationalError: 1040 (08004): Too many connections So I went ahead and made sure to connect.close() everywhere that I opened a connection, and the script made it much further but eventually …

Recently made a decision for an app I'm working on to accumulate data in batches AND THEN to insert it into the database with one statement rather than adding 1,000 records through one thousand separate inserts. Is this done better through file or memory? If I write the segments of …

What are some ways to improve MySQL performance on queries against large tables that include the HAVING BY clause. It's my understanding that anything in there doesn't benefit from table indexes.

Hey Gang! OK today I am having trouble with my transaction processing application implemented in python/MySQL. Here is some "working" testing code. import psycopg2 from psycopg2 import Error import binascii from binascii import unhexlify import mysql.connector as mysql sql='''CREATE PROCEDURE testprocedure(OUT tacos INT) BEGIN show tables; SET tacos := 1 …

Hey! I've been asked to store some data from a client in mysql in an encoded format using python. Nothing could be easier, right? I will later need to decode the same data using mysql exclusively. Given that constraint, I thought that base64 would be the go to since nearly …

More programming fun! OK this time around I'm trying to create a table with the statement, CREATE TABLE tablename ( recnumber SERIAL PRIMARY KEY, recordvalues VARCHAR ( 500 ) NOT NULL, datecreated DATE ) And it basically works, and I can add records using the dba account. However when I …

How do I create a table in postgres that's associated with a specific database? Obviously from the command line one can do Create table tablename (); But how do I make sure that the table is associated with the correct database? CREATE table dbname.tablename(); is giving me the error: ERROR: …

i have 3 tables : users, deposit, withdraw **table users :** id , username, referral 1. 1, a1, null 2. 2, a2, a1 3. 3, a3, a2 4. 4, a4, a1 5. 5, a5, a2 **table deposit :** id, users_id, amount, status, approve_date 1. 1, 1, 10000.00, approve, 2022-10-01 14:52:53 …

i am running ubuntu 22.04 and php 8.1 / MariaDB , i am missing somthing here in my code just can't see it. the premise of the code is to look at the TrolleyID Field and if it's '00000' basically echo's "BAD-READ" else it's 'GOOD-READ' any help would be great …

hello, i hope someone can help me i have a table ip in my database if there is 5 times in it he has to forward it in php to another page. thanks in advance

hii how can i make self join and sum data in other table by username i have table like this members (id, username, referral) ref_bonus (id, username, bonus) members id | username | referral ---------------------- 1 id1 id2 2 id2 null 3 id3 id2 ref_bonus id | username | bonus …

Hello friends, I am new to this site, this is my first post, My question is.. How to calculate the one rows value for next row value? [code=sql]select @rownum:=@rownum+1 "sl.no", b.bus_activity_desc "Type",r.trn_no, o.Office_name,o.Address,o.Address2,o.Address3, DATE_FORMAT(r.trn_date,GET_FORMAT(DATE,'EUR')) as trn_date, l.Account_id , if(r.trn_type=6,r.total_trn_value,0) "Credit", if(r.trn_type=7,r.total_trn_value,0) "Debit", if(r.trn_type=6 ,@cbal:=(r.total_trn_value+@cbal),@cbal:=(@cbal-r.total_trn_value)) "Closing Balance" from(select @rownum:=0) s, office_master …

Hello. I am trying to check if a table definition (the default value on a constraint) is equal to UTC Time by using the following query: IF NOT EXISTS((SELECT object_definition(default_object_id) AS definition FROM sys.columns WHERE name = 'ModifiedDate' AND object_id = object_id('dbo.WorkflowAudit')) == GETUTCDATE()) However, you can not compare a …

Hi all, I am working on a website that requires two queries from a table at the same time. They must select a row based on the id, and then another random one not including the row just selected. I currently have: $query = $pdo->prepare('SELECT title, content FROM cards WHERE …

I have the following table: my_contacts which contains the following columns: [CODE]contact_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, frist_name VARCHAR(20), interest VARCHAR(20)[/CODE] [CODE]-----------+-----------+---------- contact_id | fisrt_name | interest + ---------------------------------- 1 | smith | swim + 2 | mark | dance + ----------------------------------[/CODE] I need to move the interests column …

I have a snippet that inserts data in a row in a MySql database. If that data already exists the existing row should be updated. In my case, I continue to get insert only. What is wrong with this snippet? $page = basename($_SERVER['SCRIPT_NAME']); $ip_address = $_SERVER['REMOTE_ADDR']; include_once("includes/connection.php"); $sql=mysqli_query($con, "SELECT visits …

ERROR 1054 (42S22): Unknown column 'Firstname' in 'field list' I'M gettin the above error when I enter: mysql> insert into people (fname, lname) -> VALUES (Firstname, Lastname); Here's the table: mysql> desc people; +-------------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------------+-------------+------+-----+---------+-------+ | fname …

Hi there, Not sure if I am in the right place, but I wanted to ask where I can access a csv file for all the streets in Belgium?

Hello. I am making a database using SQLite. Then I need to make an API with functions that returns information about that database. Then I need to print out a report. However, when I try to return an answer to a query using inputs, nothing is returned. I either get …

I'm trying to create a trigger that does two things, first take an ip that's in dot notation and run inet_aton on it and put the result in another field. Second, checks a lookup table to identify an ip range that the result of the first action falls into and …

Hi all, Before I begin this question, and before you tell me we dont do homework, I would like to state that I have read a few articles, I have tried a couple of functions (=REPLACE, =SUBSTITUTE) but i'm not able to get the reuslts require, I'm new to Excel …

I've just started working with PHP and MySQL, and I'm trying to create a table in MySQL. If I've got this right, I'm trying to do so by going to my host's SQL MyAdmin page and typing in mysql_query("CREATE TABLE example( id INT NOT NULL AUTO_INCREMENT, PRIMARY KEY(id), name VARCHAR(30), …

[B]Mysql - How to use UPDATE with SELECT???[/B] I have two tables: [B]1) products_category[/B] -cat_id -cat_name [B]2) related_category[/B] -rel_cat_id (exaclty same as products_category.cat_id==related_category.rel_cat_id) -rel_cat_name [B]products_category table[/B] [IMG]http://www.ephpsolutions.com/scud/rrr/product_category.gif[/IMG] [B]related_category table[/B] [IMG]http://www.ephpsolutions.com/scud/rrr/related_category.gif[/IMG] I want to get cat_name from products_category and want to store in rel_cat_name in related_category tabel. and the query should …

I Have **"user_chat"** table name his 4 columns "msg_id" Auto Increament "chat_from_id" "chat_to_id" "chat_msgs" SELECT `chat_msgs` from `user_chat` where chat_from_id='2'AND chat_to_id='10' LIMIT 0,10 Also I have used **DESC** using above queary but not worked I want to fetch last **5 recent records** from **"chat_msgs" columns** Suggest me. Thank you

Hello all. I have a funtion in MYSQL to substruct days from a date. This function seamsto work but some dates it times out. This is my function CREATE DEFINER=`root`@`localhost` FUNCTION `Calculater`(intrval int, req date) RETURNS date DETERMINISTIC BEGIN declare calculated date; declare added int default 0; Lbl_Loop: Loop IF …

Hello guys, i've the following table in database : IdCity int CityName nvarchar(20) it has the data like this in it : IdCity CityName 1 Абакан 2 Азов 3 Александров 4 Алексин 5 Альметьевск 6 Анапа when i try to run the following view SELECT IdCity, CityName FROM dbo.City WHERE …

I come across this problem every so often and end up having to do work arounds when I would prefer to keep it in the database. I have a query where the data in the query updates frequently so the query won't stay in the cache but I don't need …

I am using bootstrap modals, when i query to populate a dropdown to fill in to my form, my query is show all but the first record and i can't figure out why. My form looks like this <div class="form-group"> <label for="deptcode">Department</label> <select class="form-control" id="deptcode" name="deptcode" value="<?php echo $mem['deptcode'];?>" <?php …

Here is a basic question, what is the fastest way to transfer a MySQL database? Here are the variables at play: 1) Database is just shy of 3GB 2) Transfer is between two servers running different versions of MySQL 3) There will not be usage of the database during transfer, …

I'm currently working on my project. I use Vertrigo as my virtual server. However recently i always see this message when i use it.... MySQL database server does not work correctly. Check whether other applications use the important port (3306)... i'd no clue at all but then i reconfigure my …

Hi group, I've just installed Visual Studio 2019 and have started my first app using this. Within the program I created a database using the tools provided in Visual Studio. I now want to begin writing to the tables I've created. But I'm stumped on how to do this. Hopefully …

plz... some give me the answer for this . this was asked in an interview.

If a bulk MySQL insert takes 5 minutes to complete, and one of the columns in the table is a TIMESTAMP column with a default value of CURRENT TIMESTAMP, will the timestamps of the rows that were inserted be reflective of the entire 5 minutes, or will they all default …

Hi to all! I'm fairly new to using High availability group and i've been having issues with storage space from my Logs drive from my primary server.. I just want to know why is my Log file not shrinking after I do backups(Full) on the primary server.. also, another question.. …

Hello i have a project that uses firebase but i want to make connect to my MySql database on xampp. Any idea what to do?

I have been cracking my head on this mater in the past couple of days. I am faced with a situaton where i need to write a MySQL equivalent of PHP code to loop through sql select results. The Php code looks like this $query = "SELECT pubid, author FROM …

Hi Please why I got this error(SQL Error: ORA-00907: missing right parenthesis) whats wrong in my code? CREATE TABLE artphoto( photonr NUMBER(10), artnr NUMBER(10) NOT NULL, filtyp VARCHAR2(5) NOT NULL, path VARCHAR2(100) NOT NULL, CONSTRAINT artphoto_photonr_pk PRIMARY KEY(photonr), CONSTRAINT artphoto_artnr_fk FOREIGEN KEY(artnr), REFERENCES art(artnr), CONSTRAINT artphoto_filtyp_ck CHECK(filtyp in ('gif','jpg')) ); …

I was attempting to store chat logs in a MySQL database where the message field is utf8_general_ci However, when it came across an emoji, it would choke, and the message field would only include text up to the emoji character. I changed the message field to be utf8mb4_general_ci, which seemed …

Hi everyone, I have database which has data of past 2 years. I want to get that data for current financial year. [COLOR="Green"](Here financial year is 1st april to 31st of March)[/COLOR] This query returns data for current calender year i.e. [Jan-to-Dec] [COde=sql] SELECT DATENAME(MONTH, DATE) AS MonthName, SUM(NetAMOUNT) AS …

I got a syntax error flag in my "users" database table, but can't figure the issue out. Please, I need your help. The following is the error message: Error SQL query: --------------------------------------------------------- -- -- -- Table structure for table `users` -- CREATE TABLE IF NOT EXISTS `users` ( `user_id` INT( …

Is the method in MySQL to set in SQL script dynamic log file name? e.g in Oracle PL/SQL set define on column sdate new_value sdate select to_char(sysdate,'YYYY.MM.DD_HH.MI') sdate from dual; spool 'logs/install_&sdate..log'; e.g. in PG/SQL \o ./logs/install_`date +"%Y-%m-%d_%H%M"`.log but I cant find similar in MySQL \T ??????

How do i format my Query result so it has thousand seperator and only to 2 decimal places <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Daily Sales</title> <link rel="stylesheet" href="../styles/login.css" media="all" /> </head> <body class="normal"> <?php include("../includes/x3connect.php"); ?> <?php $sql="SELECT SUM …

Hi I have the following code that i can run in MSSQL Query and the result are returned correctly but when i try to run it in PHP it errors what do I need to change to get it to work please. SELECT SUM (CASE WHEN FFP.BPARTNER.CUR_0='GBP' THEN (FFP.SORDERQ.YORIQTY_0 * …

Dear all, I have a scenario, where I have a single table with all my users listed in them. Each user also has a field indicating the user they report to. UserID UserDisplayName UserReportsTo ----------- ------------------------------------------------------------ ------------- 8 Anthony Karimi 3 9 naheed kassam 8 1 Administrator 1 3 Ramakrishna …

Hello all members, I am new to this this website. I am working on an assignment and I have a scenario where I have to find the key attributes, entities and keys. Below is the scenario, An international courier, express and parcel Services Company is setting up a package shipping …