SQL Server engine errors

Deadlock — the transaction was deadlocked on resources with another process

Transaction Log Full — the database transaction log is full and no writes are possible

Cannot open backup device — SQL Server cannot access the specified backup file or path

Duplicate Key — an attempt to insert a duplicate value into a unique index

Constraint Violation — violation of a primary key or unique constraint

Conflicted Constraint — the statement conflicted with a foreign key or check constraint

Login Failed — the user login attempt failed

Invalid Object — the specified object name is invalid or does not exist

Cannot Open Database — the database requested by the login cannot be opened

Permission Denied — the current user lacks the required permission on the object

Cannot Insert NULL — a required column does not allow null values

String or Binary Data Truncated — the value exceeds the column's defined length

Update Conflict — the row was modified by another transaction after being read

Incorrect syntax near — a Transact-SQL syntax error was detected at the specified token

Invalid column name — referenced column does not exist in the table or result set