Thesp_whoandsp_who2commands are older commands to show all current sessions. The DMVsys.dm_exec_sessionsreturns more data in a result set that is easier to query and filter. You'll findsys.dm_exec_sessionsat the core of other queries. ...
CommandTimeoutGroupSetting: The time in seconds to wait for SQL query commands to execute before timing out. PerfCollectionCommandTimeout: Command timeout for potentially long-running queries related to performance data collection (Default: 300) ...
Both SELECT commands must have the same number of columns in their query output. When two columns of different data types are involved in a UNION operation, the data type with the lower precedence is converted to the data type with the higher precedence. For more information, see "Data Type...
To determine the correct archive log file, issue the ROLLFORWARD DATABASE command with the QUERY STATUS option. Move the correct archive log file into the database log directory or, if the database is in a consistent state, change the log path to point to the correct archive file and issu...
在CLI 会话中设置的属性(如 SET 命令)优先级最高: CLI commands > session environment file > defaults environment file 2、重启策略(Restart Strategies) 重启策略控制 Flink 作业失败时的重启方式。与 Flink 集群的全局重启策略相似,更细精度的重启配置可以在环境配置文件中声明。 Flink 支持以下策略: execution:...
Explanation Thekeywords2clause in the statement cannot be specified with thekeywords1clause. If CODEUNITS32 is one of the incompatible elements, note that the string unit might be set implicitly with the string_units configuration parameter.
When aggregate functions are used withPIVOT, the presence of any null values in the value column aren't considered when computing an aggregation. UNPIVOT example UNPIVOTcarries out almost the reverse operation ofPIVOT, by rotating columns into rows. Suppose the table produced in the previous example...
When a template file is specified in a URL, the SQL commands or XPath query stored in the template file are executed. The template is defined within an SQL namespace. The optional header section contains parameter definitions and possible XSL file...
A disk write task begins to store the host data to disk. Host write commands continue to be accepted and data transferred to the buffer until either the write command stack is full or the data buffer is full. The drive may reorder write commands to optimize drive throughput. ...
Recall that statistics can be created or updated either manually or automatically. Statistics updates also happen because of executions of the following commands: CREATE INDEX ... WITH DROP EXISTING sp_createstatsstored procedure sp_updatestatsstored procedure ...