With Power BI Desktop, you can connect to many different types of data sources, then shape the data to meet your needs, enabling you to create visual reports to share with others. Shaping data means transforming the data: renaming columns or tables, changing text to numbers, removing rows, setting the first row as headers, and so on. Combining data means connecting to two or more data sources, shaping them as needed, then consolidating them into a useful query. Shape data by using Query Editor. Conectar-se a diferentes fontes de dados. Connect to different data sources.
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Is any valid expression of any one of the data types in the character and binary data type category, except the image, ntext, or text data types. Both expressions must be of the same data type, or one expression must be able to be implicitly converted to the data type of the other expression.
An explicit conversion to character data must be used when concatenating binary strings and any characters between the binary strings. Returns the data type of the argument with the highest precedence. Uma cadeia de caracteres de comprimento zero pode ser especificada como duas aspas simples sem nenhum caractere dentro das aspas. A zero-length character string can be specified as two single quotation marks without any characters inside the quotation marks. A zero-length binary string can be specified as 0x without any byte values specified in the hexadecimal constant.
Concatenating a zero-length string always concatenates the two specified strings. When you work with strings with a null value, the result of the concatenation depends on the session settings.
Just like arithmetic operations that are performed on null values, when a null value is added to a known value the result is typically an unknown value, a string concatenation operation that is performed with a null value should also produce a null result. If the result of the concatenation of strings exceeds the limit of 8, bytes, the result is truncated.
However, if at least one of the strings concatenated is a large value type, truncation does not occur. ExemplosExamples a. The following example creates a single column under the column heading Name from multiple character columns, with the last name of the person followed by a comma, a single space, and then the first name of the person. The result set is in ascending, alphabetical order by the last name, and then by the first name. Here is the result set. The following example concatenates multiple strings to form one long string to display the last name and the first initial of the vice presidents at Ciclos da Adventure WorksAdventure Works Cycles.
A comma is added after the last name and a period after the first initial. Employee AS e ON p. Vice President of Engineering Hamilton, J. Vice President of Production Welcker, B. Vice President of Sales 3 row s affected D. The following example concatenates multiple strings to form one long string and then tries to compute the length of the final string.
Since y is a large value type string, truncation does not occur. The following example concatenates multiple strings to form one long string to display the last name and the first initial of the vice presidents within a sample database. Name Title Duffy, T.
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