I've seen many threads about this error, but the solutions I've found don't seem to be applicable in my case. I've received a rather large (~150Go) dump file from an Oracle database. I converted it to a MySQL one, using…
I would like to receive a data object country. An object country has the following attributes (id, continent_id, language_id). Table countries { id, name, continent_id, language_id } Table continents { id, name } Table languages { id, name } Instead…
Select one if the image name is found in any column. name | col1 | col2 ----------------------------- Jack | img_3.png | img_1.png Jack | img_2.png | img_2.png Jack | img_3.png | img_1.png John | img_4.png | img_3.png Now, What I…
I have a table with 2 columns: CREATE TABLE Numbers( col1 float, col2 float ); INSERT INTO Numbers(col1, col2) VALUES('0.6', '1.5'),('2.7', '1.8'); How can I create a third column with the sum of col1 and col2?
MySql issue: I want to extract the two best age_groups per region based on their wins. I haven't had much luck on this, having browsed similar issues. It's probably straightforward but mysql isn't playing nice for me this evening. region…
I am trying to execute the following statement but it is resulting in error. There is not much to explain the situation here as the query itself is self explanatory. However, I will attach the error below: Query UPDATE swipes…
I have a huge mysqldump file (~700GB) that I want to restore on a different server. For the first GBs, the import is quite fast with some MB/s, but after some GB of data, the speed drops to something between…
I have the following six tables: distributor_master id distributor_name distributor_status DS-1 distributor1 NEW DS-2 distributor2 NEW DS-3 distributor3 UPDATED DS-4 distributor4 NEW dealer_master id dealer_name dealer_status d_country_id d_state_id d_district_id DL-1 dealer1 NEW 1 1 1 DL-2 dealer2 NEW 2 1…
I want to run the following code, but Python gives me an error code : select = input("ENTER USER FOR PASS RECOVERY : ") cursor.execute("SELECT COUNT(*) FROM user_stat WHERE usr=(%s)",(select)) python code error : mysql.connector.errors.ProgrammingError: 1064 (42000): You have an…
Assuming that I have 20L records, Approach 1: Hold all 20L records in a single table. Approach 2: Make 20 tables and enter 1L into each. Which is the best method to increase performance and why, or are there any…