I’ve found that when working on different projects, I tend to snap up a number of great-to-know things that I can re-use over and over again. One of these skills that I re-use in almost every project isthe ability to copy and paste data from Excel into a table in SQL Server. ...
COALESCE is one of the tools you have in SQL Server to work with NULL values. It may not be the first one you think of, but it can be a very good choice. In this tip I will provide examples of how you can use COALESCE to peacefully coexist with NULL values. Before we dig in to...
Is it possible to allow NULL values in foreign key? Is it possible to create table variable by copying structure of existing table? Is it possible to declare a temp table with all columns and with one identity column. Is it possible to force the query to use parallelism? Is it possibl...
Hi I only want the column to bring back 0 or NULL - ive tried <>1 but that only brings back 0 IN (N' ', N'0') but doesnt like it, LIKE... NOT = N'1' nothing works, they all bring back (if work at all) 0 and not NULL and there are definite...
Add DataAnnotations attributes at runtime in mvc3 Add dropdown list and allow adding new values add HTTPS and the web page is blank Add logo to bootstrap sidebar Add new attribute on SelectListItem Add new item in list at view and return to controller in MVC Add question mark to toolti...
5.4.2 Define methods directly in the interface, and add annotations to the methods, such as Select, Update, DeleteThen write sql statements in Select, Update, Delete , such as[AutoRepository1] public interface ICustomerRepository : IBaseRepository<Customer> { //async [Select("select od....
TheAGGREGATIONfunction specifies how to aggregate thevaluesfrom the select query. We can use SUM, COUNT, AVG, MIN or MAX, depending on what we want in the pivot table TheFORkeyword tells the PIVOT operator which column will be pivoted, ie the column that contains the values that will become...
Acursoris a handle to a specific private SQL area. In other words, a cursor can be thought of as a name for a specific private SQL area. A PL/SQLcursor variableenables the retrieval of multiple rows from a stored procedure. Cursor variables allow you to pass cursors as parameters in you...
Even if the rows are cached in memory, accessing ten memory addresses is slower than hitting one.Luckily you can force the database to store rows with similar values in the same place. This can reduce work your query does to get them. Making your SQL faster!
DECLARE EXIT HANDLER FOR 1285 SELECT "HY000 (ER_WARN_HOSTNAME_WONT_WORK) MySQL is started in --skip-name-resolve mode; you must restart it without this switch for this grant to work" as 'ERROR_NO SQLSTATE'; DECLARE EXIT HANDLER FOR 1286 SELECT "42000 (ER_UNKNOWN_STORAGE_ENGINE) Unknown...