Wednesday, 22 July 2015

Checking null in case statement in sql server

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Loading data files with SQL Server's BULK INSERT statement


  http://searchsqlserver.techtarget.com/tip/Loading-data-files-with-SQL-Servers-BULK-INSERT-statement
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  http://allthingsoracle.com/checking-for-null-with-oracle-sql/
I haven't tested this on 10g or 11g yet, I might one day, but suffice to say the vendor got it sent right back at him with a request to properly test patches they were sending us! Cheers, Norm. It's like: SELECT 1 FROM dual WHERE 1 NOT IN (2, NULL); The best description for NULL is "unknown", in this select the NULL could well be a 1, we don't know

t sql - Does SQL Server CASE statement evaluate all conditions or exit on first TRUE condition? - Database Administrators Stack Exchange


  http://dba.stackexchange.com/questions/43352/does-sql-server-case-statement-evaluate-all-conditions-or-exit-on-first-true-con
It is evaluating the code that would run in the else portion, but seems to ignore it depending on what other WHEN expressions exist and whether the divide by zero is inside a MIN or not

  http://blog.sqlauthority.com/2013/11/04/sql-server-implementing-if-then-in-sql-server-with-case-statements/
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  http://blog.sqlauthority.com/2007/04/14/sql-server-case-statementexpression-examples-and-explanation/
Example of where CASE expressions can be used include in the SELECT list, WHERE clauses, HAVING clauses, IN lists, DELETE and UPDATE statements, and inside of built-in functions. Another Problem is that : I fatch Max(columnName) and max value+1 my next value for insert statement , Now point is that when two user aceess same max value and insert same value into table than a confliction or violation of primary key error thrown by software

SQL Server: CASE Statement


  http://www.techonthenet.com/sql_server/functions/case.php
Applies To The CASE statement can be used in the following versions of SQL Server (Transact-SQL): SQL Server 2014, SQL Server 2012, SQL Server 2008 R2, SQL Server 2008, SQL Server 2005 Example The CASE statement can be used in SQL Server (Transact-SQL)

SQL Server Forums - check for nulls in case statement


  http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=86343
I guess you mean not to use it simply because the other form can be used in all cases, whereas the case expression when syntax can only be used when testing for equality of a single expression among different values, so it's more restricted

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