OPTIMIZE TABLE Command in Different Storage Engines TheOPTIMIZE TABLEcommand behavior depends on the storage engine used for the table: InnoDB. The command rebuilds the table to reclaim unused space. The operation creates a temporary table copy and replaces the original table with the optimized one...
The command lists all table names that are in the currently selected database. To show table column names and data types, run: DESC [table_name]; The command shows column names and types. To display table data, use aSELECTstatement. For example, to select everything in a table, run: S...
Though, of course - since you'd have to do this or else the database context is indeed not switching (in which case you'd expect DB_NAME() to return the same database name every time), I am using a USE statement to change database context first. Execute the qu...
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outer join except that all the rows from the right-hand table are included in the results. They can be included more than once, if more than one author exists in the publisher's city. If no author lives in the publisher's city, the author name fields are set to NULL (seeFigure 3)...
For example, if you notice that a SQL query is taking a long time to execute, you can check its status in SparkUI. SeeFigure 1. If you see a stage that has been running for over 20 minutes with only one task remaining, it is likely due to data skew. ...
Connect to the instance. Copy the script fromsqlmi/TestTCPNetworkConnection.sql at main · Azure/sqlmi (github.com): and paste it on a query window: Set desired values for@endpointand@porton theparameterssection of the script. Run the script and check the results, you will ge...
SQL QueryDESC<table name>to validate the schema. Regular expressions for validating the names of the individual fields and their values Tools like SchemaCrawler #3) Triggers When a certain event takes place on a certain table, a piece of code (a trigger) can be auto-instructed to be execut...
Method Slot Table MethodDesc Interface Vtable Map and Interface Map Virtual Dispatch Static Variables EEClass Conclusion Since the common language runtime (CLR) will be the premiere infrastructure for building applications in Windows® for some time to come, gaining a deep understanding of it will ...
SQL Server creates the schedulers based on several factors as outlined below. SQL Server 2000 In SQL Server 2000, a logical scheduler is created for each reported CPU unless thesp_configure,affinity maskoption has been established to restrict scheduler count. ...