Creada el: 05/09/98 - Actualizada el: 22/06/99

Diferencias entre SQL Server 7 y SQL Server 6.5

 

Object SQL Server 6.5 SQL Server 7.0
Batch size 128K 128 *Network Packet Size
Bytes per character or binary column 255 8000
Bytes per text, ntext, or image column 2 GB-2 2GB-2
Bytes per GROUP BY, ORDER BY 900 8060
Bytes per index 900 900
Bytes per foreign key 900 900
Bytes per primary key 900 900
Bytes per row 1962 8060
Bytes in source text of a stored procedure 65025 Batch size
Clustered indexes or constraints per table 1 1
Columns in GROUP BY, ORDER BY 16 Limited only by number of bytes
Columns or expressions in a "GROUP BY WITH CUBE" or "WITH ROLLUP" statement 10 10
Columns per index 16 16
Columns per foreign key 16 16
Columns per primary key 16 16
Columns per base table 250 1024
Columns per "SELECT" statement 4096 4096
Columns per "INSERT" statement 250 1024
Connections per client Max. value of configured connections Max. value of configured connections
Database size 1 TB 1,048,516 TB
Files per database 32 32,767
File size (data) 32 GB 32 TB
File size (log) 32 GB 4 TB
FOREIGN KEY constraints per table 31 63
Foreign key table references per table 16 63
Identifier length (in characters) 30 128
Index key size (bytes) 900 900
Locks per connection Max. value of locks configured Max. value of locks configured
Maximum number of tables per query 16 255
Nested subqueries 16 64
Nested trigger levels 16 32
Nonclustered indexes or constraints per table 249 250
Objects in a database * 2 billion 2,147,483,647
Parameters per stored procedure 255 1024
PRIMARY KEY constraints per table 1 1
Rows per table Limited by available storage Limited by available storage
SQL string length (batch size) 128K 128 *TDS packet size
Tables per database 2 billion Limited by number of objects in a database
Tables per "SELECT" statement 16 32
Triggers per table 3 Limited by number of objects in a database
UNIQUE constraints per table 249 250 Nonclustered and 1 clustered

 

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Por Luis Walter Reynoso para Ethek & Friends