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- terminology - What does collation mean? - Database Administrators . . .
It hasn't changed at all in the past 600 years "collate" means "to bring together" and whether it's the ordering of a book, chronologically or otherwise in a database, it's all the same Computer Science
- sql server - What does this statement mean: SELECT . . . COLLATE SQL . . .
COLLATE SQL_Latin1_General_CP1_CI_AS AS [-- Logins To Be Created --] It is part of a script I'm trying to adapt for listing out the SQL Server logins in an instance to be migrated into another instance
- What are the rules for using COLLATE in a query?
You do need COLLATE in the string concatenation because you are mixing database-level meta-data (which uses the database's default Collation) and system-level meta-data (i e state_desc and permission_name) which comes from the hidden mssqlsystemresource database and usually has a Collation of Latin1_General_CI_AS_KS_WS
- postgresql - Is LC_COLLATE different from COLLATE? - Database . . .
LC_COLLATE refers to a name of locale from the operating system, whereas COLLATE refers to a collation that should exist in pg_catalog pg_collation pg_catalog pg_collation is originally populated in the template databases when the PostgreSQL instance is created (by initdb)
- postgresql - Is there any performance issue with including the COLLATE . . .
If you then specify a COLLATE clause in the query that is different than the collation used for the index, you will have a performance penalty because you won't be using that index But, to specify a collation in a query that is different than the column's collation when an index is not available for the column's collation is not a performance issue as the data was not sorted in either
- Whats the meaning of the Collation Code (blank, 90, 100, 110) in SQL . . .
During the installation of SQL Server 2012, in the Collation tab, i can choose between French_CI_AS and French_100_CI_AS What do they mean and which one is newer? When there's no Code, is it newe
- What is the collation used while comparing Unicode string literals in . . .
But it does not The difference in your two comparisons is that the non-Unicode comparison, when using a SQL Server collation (i e one with a name starting with SQL_ ) , is not using Unicode comparison rules, whereas if you were using a Windows collation, it would use the same comparison rules for both Unicode and non-Unicode comparisons
- Having charset utf8mb4 - does it mean every character takes 4 bytes . . .
VARCHAR(80) COLLATE 'utf8_general_ci' column will be exactly 80x3=240 bytes long VARCHAR(80) COLLATE 'utf8mb4_general_ci' column will be exactly 80x4=320 bytes long P S InnoDB engine has so called "overflow pages" for table storage where all long data resides The root page stores only a prefix for indexing and a pointer to the following page
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