Think of this as being equivalent to running this in SQL*Plus: @my_script.sql; Each statement is executed. Also, ALL rows are fetched. So once it’s finished executing, there are no open cursors left around. The more obvious difference here is that the output comes back formatted as pla...
Slow SQL queries in ApsaraDB for ClickHouse,ApsaraDB for ClickHouse:If your ApsaraDB for ClickHouse cluster encounters performance issues or when you perform periodic maintenance, you can view slow SQL queries to troubleshoot the issues. This topic descr
If the query window contains multiple queries, an execution plan is displayed for each query. On the Query menu, click Show Execution Plan, and then run the query in the query window. Execution plans and query results now appear in separate panes of the window so you can view them ...
Figure 12** Identifying Queries that Execute Most Often **(Click the image for a larger view) Queries Suffering from Blocking Queries that suffer the most from blocking are typically long-running queries. After identifying these queries, you can analyze them to determine whether they can and shou...
You can create multiple nonclustered indexes on a table or indexed view. Generally, nonclustered indexes should be designed to improve the performance of frequently used queries that aren't covered by the clustered index.Similar to the way you use an index in a book, the query optimizer...
Commandline tool for running SQL queries against JSON, CSV, Excel, Parquet, and more. - multiprocessio/dsq
In SQL Server, a view is like a virtual table where the view data comes from one or more tables or other views. However, views are referenced just like tables in queries. Views can hide the complexity of queries and help protect data by limiting the set of rows and c...
How to create SQL UNION clause with two queries that BOTH have a WHERE clause? How to create table variables dynamically? How to create the table name without username attached to it? How to Create view from multiple views How to create view from the output of a dynamic sql? how to crea...
Once connected to the database, you can view the standard built-in system databases (master, model, msdb and tempdb) of SQL Server. 10. Now you can start creating your own databases and running queries for them. Select File > New > Query with Current Connection and type the ...
To view live query statistics for any query The live execution plan can also be accessed from theActivity Monitorby right-clicking on any query in theProcessesorActive Expensive Queriestable. Remarks The statistics profile infrastructure must be enabled before live query statistics can capture informati...