I have to say I’m an amateur on MySQL, plus english is not my mother’s language. Here is my first table “Teacher”: And here my second table “Course”: I would like to know which country has more teachers giving courses, but I don’t want that it count the same teacher twice. So far I made this: When I run this,
Tag: database
how to merge multiple rows into single in MSSQL
this is my data: id segment country product status month year 83916512 Government Null Null Null Null 2014 83916512 Null Germany Null Null Null 2014 83916512 Null Null Carretera Null Null 2014 83916512 Null Null Null completed Null 2014 83916512 Null Null Null Null June 2014 83916512 Null Null Null Null Null 2014 i want below output can anybody help
Convert day of week name to day of week number Vertica
With this way – SELECT TO_CHAR(NOW(), ‘DAY’); I can get a day of week name(E.G. MONDAY). With SELECT dayofweek(NOW()); I can get the number of the day of week. (E.G 1) QUESTION: How to convert day of week name to day of week number. (E.G MONDAY -> 1) SMTH like TO_NUMBER(‘MONDAY’, ‘DAY’); –> 1 (just for example, don’t working) Answer
A difference of 10 days in Access SQL
I want to show how many orders have been shipped 10 days before the required date in Access SQL, but I can’t seem to get the syntax right. Answer
SQL query to get Column A with all Column B
I have a table that has 2 columns customer and city . there are 4 unique cities (w,x,y,z) I want customers that is associated with all cities. So for the table +———-+——+ | Customer | City | +———-+——+ | A | W | | A | X | | A | Y | | A | Z | | B
Continue executing sql statements if error found python sqlite3
I have a file containing sql commands and I want to execute the commands given in the file and if any command throws any error then ignore the error and execute the next command. Here is a sample file: For eg. if the classroom table doesn’t exists then the drop table command will produce an error and the program will
Is there a way to convert this query into Oracle query using merge statement?
Answer I think this does what you expect. Without table structures and sample input data it is not possible for me to test it.
Chat schema with one side deletion
I’m struggling with a chat schema that permits deletion from one side of the conversation in a relational database (PostgreSQL). Here is my best approach: my schema All schemas I found were about …
Does SQLite support character range with [ ]?
I’m trying to use Northwind version in SQLite (someone posted it on Github and it’s super handy), but my query for selecting employees with last name starting with B, C, D, …, L using LIKE returns empty table: The table contains such names (most of them, in fact). Does SQLite not support character range in LIKE with []? Answer SQLite
How to display a list of departments whose teachers teach DBMS department students?
I have a database in Access. The database has 4 tables: [DEPARTMENT], [TEACHER], [LECTURE], [SGROUP]. I need to display a list of departments whose teachers teach DBMS department students. The …