Not sure exactly what you try to denote with that syntax, but in almost all RDBMS-es you can use a subquery in the FROM clause (sometimes called an “inline-view”): SELECT.. FROM ( SELECT … FROM … ) my_select WHERE … In advanced “enterprise” RDBMS-es (like oracle, SQL Server, postgresql) you can use common table expressions … Read more
Just allow column university_id of table user to allow NULL value so you can save nulls. CREATE TABLE user ( uid INT NOT NULL, Name VARCHAR(30) NOT NULL, university_ID INT NULL, — <<== this will allow field to accept NULL CONSTRAINT user_fk FOREIGN KEY (university_ID) REFERENCES university(university_ID) ) UPDATE 1 based on your comment, you … Read more
Add an alias for mytable like this: select t.*, (case when PRI_VAL = 1 then ‘High’ when PRI_VAL = 2 then ‘Med’ when PRI_VAL = 3 then ‘Low’ end) as PRIORITY from MYTABLE t; This is not dependent on any specific Oracle version, not sure about other databases.
Escaping is automatic, you just have to call: cursor.execute(“query with params %s %s”, (“param1”, “pa’ram2”)) (notice that the python % operator is not used) and the values will be correctly escaped. You can escape manually a variable using extensions.adapt(var), but this would be error prone and not keep into account the connection encoding: it is … Read more
Use setParameterList(). You’ll also have to put parenthesis around the list param. session.createQuery(“select cat from Cat cat where cat.id in (:ids)”).setParameterList(“ids”, new Long[]{1,2,3,4,5})
You can write multiple cases, even if they all have the same condition. ORDER BY CASE @OrderByColumn WHEN 1 THEN Forename END DESC, CASE @OrderByColumn WHEN 1 THEN Date END, CASE @OrderByColumn WHEN 1 THEN Location END, CASE @OrderByColumn WHEN 2 THEN Surname END ASC Actually, you don’t specify a column to sort by, but … Read more
p_temp_foo is an IN parameter. By nature, these are read only. You could define it as an IN OUT parameter, or an OUT parameter. For more info see here: http://plsql-tutorial.com/plsql-passing-parameters-procedure-function.htm
see this sample: create table test (mycol UniqueIdentifier NOT NULL default newid(), name varchar(100)) insert into test (name) values (‘Roger Medeiros’) select * from test for add a not null field on a populated table you need this. alter table test add mycol2 UniqueIdentifier NOT NULL default newid() with values CREATE UNIQUE NONCLUSTERED INDEX IX_test … Read more
When you create the table you can do something of this sort, CREATE TABLE names ( name text CONSTRAINT namechk CHECK (char_length(name) <= 255) ) (namechk is just a name for the constraint) Same goes for ALTER TABLE for example: ALTER TABLE names ADD CONSTRAINT namechk CHECK (char_length(name) <= 255);
You should be able to do something like this: SELECT * FROM TableName WHERE (Forename LIKE ‘%’ + @SearchValue + ‘%’) OR (Surname LIKE ‘%’ + @SearchValue + ‘%’) OR (@SearchValue=”ALL”) ORDER BY CASE @OrderByColumn WHEN 1 THEN Forename WHEN 2 THEN Surname END; Assign 1 to @OrderByColumn to sort on Forename. Assign 2 to … Read more