My present article talks about an error that you will encounter when connecting to Oracle database using OPENQUERY. Let us learn about how to fix error 9803.
SQL SERVER – Maximum Columns per Primary Key – Fix : Error : Msg 1904, Level 16, The index on table has column names in index key list. The maximum limit for index or statistics key column list is 16
What are the maximum columns per primary key? It is 16, and going past it raises Msg 1904. The same limit applies to foreign keys and index keys.
Reading the SQL Server Support Lifecycle
Read the SQL Server support lifecycle for your exact release, distinguish mainstream and extended support, and plan before coverage ends.
LEFT Boundaries: Zero, Oversized Length and Missing Text
LEFT boundaries keep empty prefixes separate from missing values. Eight short Unicode cases expose zero, oversized and missing lengths. A separate invalid request shows why negative lengths need validation.
SQL SERVER – Logical Query Processing Phases – Order of Statement Execution
Logical Query Processing is the order in which SQL Server handles each clause of a statement, with FROM and ON first and SELECT near the end. Here are the phases.
DATEFROMPARTS: Build Dates With Explicit Components
DATEFROMPARTS avoids ambiguous text assembly. Preserve year, month and day inputs while separating missing components from invalid calendar dates.
SQL SERVER – Mirrored Backup and Restore and Split File Backup
From a real project: conventional backup and restore, split file backup when a disk runs short of space, mirror file backup, and the FORMAT clause.