what is the difference between temp table and table variable?
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Temporary Tables are physically created in the tempdb database. These tables act as the normal table and also can have constraints, index like normal tables. Table Variable acts like a variable and exists for a particular batch of query execution. It gets dropped once it comes out of batch.
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Variables are data values that can change when the user is asked a question, for example, their age. Variables may change during program execution. A variable is a memory location . It has a name that is associated with that location.
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Here a summary of the differences between queries and tables… Data is not physically stored in a query whereas a table is the physical data archive. ... In a query, you can bring fields from more than one table together for a query linking them into a relationship and therefore create more flexible reports.
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A cursor variable is a variable that references to a cursor. Different from implicit and explicit cursors, a cursor variable is not tied to any specific query. ... To declare a cursor variable, you use the REF CURSOR is the data type. PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR .
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Local temporary tables ( CREATE TABLE #t ) are visible only to the connection that creates it, and are deleted when the connection is closed. Global temporary tables ( CREATE TABLE ##t ) are visible to everyone, and are deleted when all connections that have referenced them have closed.
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Local Variable: This variable has a scope local to the function. Volatile Variable: volatile just tells the compiler or force the compiler to "not to do the optimization" for that variable. ... Originally Answered: What is the Difference between a Local Varible and a Volatile variable declared in a same function?
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From what I understood from the training videos, the difference lies in the scope of these variables. Session variables are meant to persist between flows, but flow variables are not supposed to persist.
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The hidden fields can be unhidden at any time. Tableau Desktop uses the location pointed to by the system's %TEMP% environment variable for all temporary files used in the process of creating extracts. Tableau Server uses the folder :\ProgramData\Tableau\Tableau Server\data\tabsvc\temp.
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There is no difference between a variable and a data type. A data type is a type of data, e.g. int for integer, i.e. whole number, String for text, double for precise decimal numbers and so on. A variable is an instance of a data type. ... String s = “String value”; // Where variable s is of data type String.
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Data Basics - Variables and Constants. Important Terms: A variable is a named memory location which temporarily stores data that can change while the program is running. A constant is a named memory location which temporarily stores data that remains the same throughout the execution of the program.
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Difference Between %TYPE and %ROWTYPE. %TYPE provides the data type of a variable or a database column to that variable. %ROWTYPE provides the record type that represents a entire row of a table or view or columns selected in the cursor.
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A variable can be thought of as a memory location that can hold values of a specific type. ... For instance, a variable that holds text strings has a String data type and is called a string variable. A variable that holds integers (whole numbers) has an Integer data type and is called an integer variable.
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['Control_table, with known data.', 'New_table, with data to check.', 'Result_table, table where records with different values in new_table then control_table are inserted to.']
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Local temp tables are only available to the SQL Server session or connection (means single user) that created the tables. ... A global temporary table remains in the database permanently, but the rows exist only within a given connection. When connection is closed, the data in the global temporary table disappears.
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So we can say that class variables and instance variables are fields while local variables and parameter variables are not. The question is old but another important difference between a variable and a field is that a field gets a default value when it's declared. A variable, on the other hand, must be initialized.
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Summary – Variables vs Data Literals in Java The difference between variables and data literals in Java is that variables are the reserved memory locations to store values with symbolic names while data literals are notations of representing fixed values in programming.
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tmp are temp files from installer, you can just delete them. the question is why are they there, normally msi installer uses the %temp% variable. try a new install of msi.