[<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source name not found and no default driver specified [ODBC SQL Server Driver] Invalid Paramete...
There's potentially much less I/O to execute the query, if the index is narrow enough when compared to the rows and columns in the table itself, meaning it's a real subset of the total columns. Consider covering indexes when selecting a small portion of a large table, and where that...
There's potentially much less I/O to execute the query, if the index is narrow enough when compared to the rows and columns in the table itself, meaning it's a real subset of the total columns. Consider covering indexes when selecting a small portion of a large table, and where that ...
There's potentially much less I/O to execute the query, if the index is narrow enough when compared to the rows and columns in the table itself, meaning it's a real subset of the total columns. Consider covering indexes when selecting a small portion of a large table, and where that ...
The database commonly uses an index range scan to access selective data.Theselectivityis the percentage of rows in the table that the query selects, with 0 meaning no rows and 1 meaning all rows. Selectivity is tied to a querypredicate, such asWHERE last_name LIKE 'A%', or a combinatio...
So adding it to a query, as described in this article, might change the meaning of the query and not just the plan. Iow, take care! Using STRAIGHT_JOIN might change your query from an implicit LEFT JOIN to an implicit INNER JOIN. https://gist.github.com/tom--/893e62688b69014e09b...
As you can see, the number of logical reads is 31, meaning SQL Server read 31 8KB pages to show the result. We wrote a query to find details of some reputation values on a particular day. SQL Server performed a clustered index seek operation, as you see in the following image: ...
`iii_sss_msg`.`sub_category` IN (1000305, 1000306, 1000501, 1000502) ) ) ) order by `iii_sss_msg`.`gmt_create` desc limit 0, 5 )union all ... The statement is relatively complicated. Generally speaking, the meaning of the SQL statement is to find the last five messages of certain...
Moving the data conversion from the left side to the right side of a comparison operator might change the meaning of the conversion. In the above example, when the CONVERT operator was added to the right side, the comparison changed from an integer comparison to a varbinary comparison. ...
They have the same meaning as for the ALTER TABLE statement. For more information, see Section 15.1.9, “ALTER TABLE Statement” NDB Cluster supports online operations using the same ALGORITHM=INPLACE syntax used with the standard MySQL Server. See Section 25.6.12, “Online Operations with ...