What does NOLOCK mean and when do we use it?NOLOCK is a table hint in SQL ServerThe word NOLOCK itself is a shorthand code, because we have this table hint, people often refer to this as using NOLOCK. What we’re saying when we use NOLOCK is that we are using an isolation ...
This is similar to the TSQL IN operator commonly used to specify multiple values in a WHERE clause. Previously, it was common to specify multi-value filters using the logical OR operator, like in the following measure expression: DAX Kopiraj Filtered Sales:=CALCULATE ( [Internet Total Sales]...
What does it mean that BACKUP TABLE / RESTORE TABLE are not "yet" implemented? 文章 20/02/2008 Say you are one of those users who have been using SQL Server since 6.x days. And say you remember that in those versions there was the possibility to backup or...
This is similar to the TSQL IN operator commonly used to specify multiple values in a WHERE clause. Previously, it was common to specify multi-value filters using the logical OR operator, like in the following measure expression: DAX Copy Filtered Sales:=CALCULATE ( [Internet Total Sales], ...
Unfortunately, the notation falls short again for similar reasons. While it helps us determine the type of the variable, does the type really even matter? We?re still adding redundancy and length, and we?re reducing readability in a condition where type checking isn?t even required. When we...
This question came up during the discussion. Does high wait in SOS_SCHEDULER_YIELD as shown insys.dm_os_wait_statsindicate an underlying CPU performance problem? Answer: it depends if high count or high wait? To keep a single executing thread from taking 100% CPU, our code automatically reli...
OR '2011/10/12' or anything with slashes, hyphens, or colons. It is interpreted by the engine and stored as described earlier. The point is, changing the format of how you are requesting or inputting the date does not change performance or ...
That's the way most people WANT it to work. You have to understand that NULL means nothingness. There is nothing to compare, so NULL can't be used as part of the constraint, because there isn't anything there. Null doesn't mean null, null really means nonexista...
Redgate - SQLBackup BACKUP DATABASE successfully processed 4098225 pages in 513.281 seconds (62.377 MB/sec). SQLBackup did not change times when I passed in different buffercount and maxtransfersize. Native sql Buffercount = 8 RESTORE DATABASE successfully processed 4780071 pages in 140.001 seconds...
This is similar to the TSQL IN operator commonly used to specify multiple values in a WHERE clause. Previously, it was common to specify multi-value filters using the logical OR operator, like in the following measure expression: DAX Copy Filtered Sales:=CALCULATE ( [Internet Total Sales], ...