where-clause

Using a case expression in a where clause

Although I know this isn't very efficient, I need to get this working fast so I try to follow the easiest path, or at least I thought so. I'm trying to get the max data out of an entity and take into consideration only the rows where USER is not null, and in case no rows have USER not set to null, then I will take the null ones into cons...

mysql select a row only if a field at another row is equal to

I have these two tables: tAccounts id, name, server_id tFriends id_lo, id_hi Now, I'm trying this query: SELECT FR.id_lo AS id_friend FROM tFriends FR, tAccounts AC WHERE (FR.id_hi = 4 && AC.server_id != -1) ........ In order get the friends of a certain user, while making sure his friend's server_id is different than '-1' ! Any i...

LINQ Join With Multiple Where Clause

Hello all. I am struggling once again so any help would be gratefully received. I have the following LINQ that pulls back a list of data: public static List<tblWeight> GetWeights(string memberid, string locationid, string buyer, string subcategory, string product) { MyEntity getweights = new MyEntity (); ...

Zend multiple where

I have thi next code, but he doesn't work: $select_sell = $this->select(); $select_sell->from($this->_name, array('rank_id')) ->where('rank_id = ?', $id) ->where('type = ?', 'must_sell'); $result = $this->fetchAll($select_sell)->count(); I need to make this query ... WHERErank_id= $id ANDtype= 'must_sell'.. Th...

How does MySQL handle WHERE tests?

Hi, As I was coding a php page building a MySQL request according to GET parameters, I was wondering if MySQL does any kind of reorganization of WHERE tests in a request, or if it just takes them as they come. For example, if I execute this request: SELECT * FROM `table` t WHERE (SELECT `some_value` FROM `another_table` u WHERE `t.id`...

Exposing SQL fired when LINQ executes

Morning all. Just a quick one for you - where can I find the SQL that is executed when a LINQ statement fires? I have the following code that works a treat, var r = (from p in getproductweightsbuyer.tblWeights where p.MemberId == memberid && p.LocationId == locationid ...

SQL conditional where Clause executing using querystring parameters - If function needed?

Hello all, me again! I have the following sp that uses a condtional where clause - ish! @MemberId varchar(7), @LocationId varchar(8), @UUF1 varchar(150), @UUF2 varchar(50), @UUF4 varchar(50), @IDDesc varchar(255), @OwnBrand nvarchar(50), @WeightStatus varchar(50), @MaterialLevel varchar(10), @BaseMaterialName varchar(15), @ExtendedMa...

Having problems converting conditional where clause in LINQ back over to SQL

Hello all. I've got myself in a bit of a pickle! I've done a snazzy LINQ statement that does the job in my web app, but now I'd like to use this in a stored procedure: var r = (from p in getautocompleteweightsproducts.tblWeights where p.MemberId == memberid && p.LocationId == location...

sql server conditional where

select * from table where category=@categoryid I'm not sure how easy is this but I couldn't get my head around it. I want to be able to change where clause on above query so that if use 0 instead of 1-2-3 or 4 as @categoryid it would select all categories. i don't have any category with 0 in database. ...

Composing a where clause in LINQ query at runtime

I'm getting an array of strings for which I want to see if a certain number of data fields in the domain object have all of those strings. I know the data fields at compile-time but I don't know the size of the array at compile-time. Is there a way that I can compose a where clause at run-time so that I can do what I'm looking for in a ...

Entity Framework Views and Linq .Where

I have a very small entity framework setup containing only a few related classes/tables and a view. I need to be able to pull a specific record from this view, namely, I need to be able to grab the record that meets two criteria, it has a specific ProfileID and a specific QuoteID. This line is what's causing the problem: TWProfileUpcha...

Dynamic Where in Linq to SQL

How would I get something like this to work so that I can dynamically alter the where-clause in this linq to sql query? Dim AccountID = 1234 Dim AccountList Select Case Types Case 1 AccountList = (from a in dc.Accounts where a.ID = AccountID) Case 2 AccountList = (from a in dc.Accounts where a.ID = AccountID An...

Regex: does a SQL statement include a WHERE clause?

I need a regex that will determine if a given SQL statement has a WHERE clause. My problem is that the passed SQL statements will most likely be complex, so I can not rely on just the existence of the word WHERE in the statement. For example this should match SELECT Contacts.ID , CASE WHEN (Contacts.Firstname IS NULL) THEN '' ...

SQL Server like statement behavior for %%

In terms of performance, how does the like operator behaves when applied to strings with multiple % placeholders? for example: select A from table_A where A like 'A%' takes the same time to select than select A from table_A where A like 'A%%' ??? ...

MySQL cross-database WHERE clause

I am working on a project that obtains values from many measurement stations (e.g. 50000) located all over the world. I have 2 databases, one storing information on the measurement stations, the other one storing values obtained from these stations (e.g. several million). A super-simplified version of the database structure could look li...

SQL: Redundant WHERE clause specifying column is > 0?

Help me understand this: In the sqlzoo tutorial for question 3a ("Find the largest country in each region"), why does attaching 'AND population > 0' to the nested SELECT statement make this correct? ...

make differential in DATE query in MySQL

what is the different from this mysql query: WHERE MONTH(date) = MONTH(CURRENT_DATE) and this WHERE date BETWEEN DATE_SUB(CURRENT_DATE(), INTERVAL 1 MONTH) AND CURRENT_DATE() i have tried both but i cant see the different. ...

use WHERE CLAUSE for search data from A date until B date

lets say i have two drop down list and one button on my search page: From <select id="1stdate"> Until <select id="2nddate"> <input type="button" id="search"> i want to search data from 1stdate until 2nddate, how to use WHERE CLAUSE for this case? for ex. i want to search data "from 09-2010 until 11-2010". this my query: SELECT CONCAT...

mysql NULL value in where in CLAUSE

how to deal with NULL value in mysql where in CLAUSE i try like SELECT * FROM mytable WHERE field IN(1,2,3,NULL) it not working only work like : SELECT * FROM mytable WHERE field IN(1,2,3) OR field IS NULL how can i get it work in WHERE IN ? it is possible ? ...

Select Query is not working with WHERE clasue when there is a space in Column Name

I have got SQL Server database in which Table column name have spaces. For example I have a Table something like this: ID| First Name| Last Name|Birth Date 1 | Wasim | Akram | 01-01-2000 2 | Saeed | Anwer | 01-01-2001 Now When I use a following query(column name with space) I get empty result: SELECT * FROM table WHERE...