The EXPLAIN command will fail if you use it for other SQL commands, such as data definition language (DDL) or database operations.The EXPLAIN output relative unit costs are used by Amazon Redshift to choose a query plan. Amazon Redshift compares the sizes of various resource estimates to ...
To obtain information about an explainable SQL statement that references a declared temporary table, the EXPLAIN statement must be executed in the same application process in which the table was declared. For static EXPLAIN statements, the information is not obtained at bind-time but at run time w...
This section describes various types of Filters. Filter If an execution plan contains only the Filter keyword, the filter condition does not hit any index. In this case, you need to check the table indexes and configure indexes again to accelerate the SQL query. Note If an execution plan...
In addition to supporting encryption at rest, SQL Server supports encrypting data within columns using Always Encrypted. Once data is encrypted, the application accessing the database must have the correct certificate in order to view the plain text values of the data....
In addition to these features, the extension allows you to view information about your SQL Server’s configuration and storage utilization. SQL Server licensing models There are several different options related to how SQL Server is licensed when using the Azure IaaS offering. ...
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Arranging your data that way, however, gets in the way of Excel's abilities to use a clean array of data as a database and, based on that, perform the kind of summaries, data extractions--analyses of various types--that Excel excels at. ...
Language functions that operate on strings, such as those that return the length of a specified string or which compare two strings, look for the terminator as a marker. However, there is a risk in using this feature: if that terminator is somehow overwritten by some other value, a ...
Not only do you need to consider your immediate needs, but you also have to think about your long-term goals. Additionally, you need a deep understanding of various database types, including their differences, use cases, and more. After all, your database selection can impact your ...
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