Compute Scalar operator performs a scalar computation and takes the task of completing the CONCAT function operation for this query execution. On the other hand, if we find out this operator for any table which has a huge number of rows, this situation may indicate a performance issue. However, this isn’t a problem for this table because it contains only one row. The table scan operator indicates that the query optimizer is required to read whole data of the Test_NumericValue because it does not contain any index. Let us briefly explain the query plan mentioned above. The reason why we analyze the execution plan is that all details about the query processing operation are hidden in it: In this step, we will analyze the actual execution plan details of the query. SELECT CONCAT ( Number_1, Number_2, Number_3 ) FROM Test_NumericValue In this example, we will join Think and green strings with the CONCAT function: The CONCAT function at least requires two parameters and this function can accept a maximum of 254 parameters. The syntax of the function looks like as follows:ĬONCAT ( string_value1, string_value2 ) Now, we will go into the point with a simple example. CONCAT function is a SQL string function that provides to concatenate two or more than two character expressions into a single string. CONCAT function in SQL is one of the most useful members of these functions. SQL string functions are used to manipulate the character expressions or to obtain various information about them. We can use nvarchar(max) or varchar(max) instead. These data types are deprecated, and for this reason, we should try not to use these data types. We have to take into account one point about the text and ntext data types. Unicode character strings data types that store Unicode character data These are:Ĭharacter strings data types that store non-Unicode character data In terms of SQL Server, we can categorize SQL string data types into different two groups. In this article, we will explore the syntax, working mechanism and other details of the CONCAT function in SQL and we will also make up various different examples about it.Ī string is a set of characters that helps to declare the texts in the programming languages.
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