Lua difference between pairs and ipairs
lua difference between pairs and ipairs — pairs() Returns Key-Value Pairs — ipairs() Returns Integer-Value Pairs
Global variables lua
global variables lua –[[ Global variables don’t need a declaration like “local.” Instead, you’d just write like this: ]]– variable = –value –[[ Note, you don’t always have to even assign a value to a variable. You can use it for the first time and get a value of “nil” which you can update later. […]
What does declare do in mysql
what does declare do in mysql — MySQL DECLARE variable_name datatype(size) [DEFAULT default_value]; — Declaring a variable without specifying a default value will result it — in being a null value. — Declare is what allows us to create a variable
Var in sql
var in sql One way of doing this is to use database variables create table testcalc ( id int(11) not null auto_increment, num1 int(11) default null, num2 int(11) default null, num3 int(11) default null, num4 int(11) default null, primary key(id) ); insert into testcalc values (default, 1, 2, 3, 4), (default, 5, 10, 15, 20); […]
Unique key
unique key ALTER TABLE students ADD UNIQUE (S_Id) unique key CREATE TABLE students ( S_Id int NOT NULL, LastName varchar (255) NOT NULL, FirstName varchar (255), City varchar (255), UNIQUE (S_Id) )
Unable to start xampp mysql
unable to start xampp mysql 3 One of many reasons is xampp cannot start MySQL service by itself. Everything you need to do is run mySQL service manually. First, make sure that ‘mysqld.exe’ is not running, if have, end it. (go to Task Manager > Progresses Tab > right click ‘mysqld.exe’ > end task) Open […]
Substring sql
sql server substring SELECT SUBSTRING(‘SQL Tutorial’, 1, 3) AS ExtractString; substring sql SELECT SUBSTRING(‘SQL Tutorial’, 4, (LENGTH(‘SQL Tutorial’)) AS LastCharactersString; //Result -> Tutorial grab part of a string sql SELECT Â Â Â Â SUBSTRING(‘SQLTutorial.org’, Â Â Â Â Â Â Â Â POSITION(‘.’ IN ‘SQLTutorial.org’)); grab part of a string sql SELECT SUBSTRING(‘SQLTutorial.org’);
Sqlalchemy return id after insert
sqlalchemy return id after insert f = Foo(bar=’x’) session.add(f) session.flush() print(f.id) # will return the obj id sqlalchemy return id after insert session.flush() print(f.id)
Sql query to replace a value in table
sql query to replace a value in table Update tbl.Products Set articlenumber = replace(articlenumber, ‘s401’, ‘I00010’)
Sql query to get column data type in sql
sql query to get column data type in sql SELECT DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ‘yourTableName’ AND COLUMN_NAME = ‘yourColumnName’