In MySQL, @variable indicates a user-defined variable. You can define your own. SET @a = 'test'; SELECT @a; Outside of stored programs, a variable, without @, is a system variable, …

Consider also using SETX - it will set variable on user or machine (available for all users) level though the variable will be usable with the next opening of the cmd.exe ,so often it can be …

Mar 18, 2016 · Firstly, it allows you to use a reserved keyword as a variable like this: int @int = 15; The second option lets you specify a string without having to escape any characters. For …

Jan 8, 2015 · I found your question looking for a solution to the same problem; and what other answers fail to point is a way to use a variable to change the name of the table for every …

In summary, this technique is taking advantage of a feature of how the language is compiled. That is, JavaScript "short-circuits" the evaluation of Boolean operators and will return the value …

@Ecropolis - yes, in SQL Plus use period by default. Use SET CONCAT to define the character that separates the name of a substitution variable from alphanumeric characters that …

SQL> variable v_emp_id number; SQL> select 1234 into :v_emp_id from dual; 1234 ----- 1234 SQL> select * 2 from emp 3 where empno = :v_emp_id; no rows selected In SQL Developer, if …

The value of the !_var! variable is evaluated as late as possible while the %_var% variable works just as before. Delayed Expansion will cause variables within a batch file to be expanded at …

Jul 15, 2017 · 2) Setting the path of Maven in environment Variables: Search the Environment Variable --> Edit the System Environment variables--> Navigate to Advanced tab --> …

Sep 15, 2011 · FYI, in SQL Server 2008 and above, the following syntax is also valid for inserting multiple explicit values into a table variable: `insert into @values values ('A'),('B'),('C') – …