You’ll have to use dynamic SQL for that, since ALTER TABLE does not accept variables or subqueries. CREATE TABLE PKTest ( ID INT PRIMARY KEY ) ; DECLARE @SQL VARCHAR(4000) SET @SQL = ‘ALTER TABLE PKTEST DROP CONSTRAINT |ConstraintName| ‘ SET @SQL = REPLACE(@SQL, ‘|ConstraintName|’, ( SELECT name FROM sysobjects WHERE xtype=”PK” AND parent_obj = … Read more
With Linq2Sql dc.GetCommand(query).CommandText see http://msdn.microsoft.com/en-us/library/system.data.linq.datacontext.getcommand.aspx for more info. But I usually use LinqPad
in the early 1970s. Initially called SEQUEL (Structured English Query Language) and based on their original language called SQUARE (Specifying Queries As Relational Expressions).SEQUEL was later renamed to SQL by dropping the vowels, because SEQUEL was a trade mark registered by the Hawker Siddeley aircraft company.
The only part of it you can parameterise are values used in WHERE clause. Consider this sample from official doc: public interface UserRepository extends JpaRepository<User, Long> { @Query(value = “SELECT * FROM USERS WHERE EMAIL_ADDRESS = ?1”, nativeQuery = true) User findByEmailAddress(String emailAddress); }
Try with this script, maybe will be useful: SELECT CAST(‘TRUE’ as bit) — RETURN 1 SELECT CAST(‘FALSE’ as bit) –RETURN 0 Anyway I always would use a value of 1 or 0 (not TRUE or FALSE). Following your example, the update script would be: Update Table Set BitField=CAST(‘TRUE’ as bit) Where ID=1
EDIT: previously advised solution works only for MSSQL. Therefore I am adding an Oracle solution. I am keeping the original answer below. I thought of one more solution (though the one provided by Justin Cave still seems a bit better) – using temporary tables. Here is how it may look like CREATE GLOBAL TEMPORARY TABLE … Read more
Just place both keys in the ON CONFLICT clause: INSERT INTO answer VALUES (1,1,’q1′) ON CONFLICT (person_id,question_id) DO UPDATE SET answer = EXCLUDED.answer; Example: INSERT INTO answer VALUES (1,1,’q1′) ON CONFLICT (person_id,question_id) DO UPDATE SET answer = EXCLUDED.answer; SELECT * FROM answer; person_id | question_id | answer ———–+————-+——– 1 | 1 | q1 (1 Zeile) … Read more
ALTER TABLE YourTable ADD CONSTRAINT UQ_YourTable_ConstraintName UNIQUE(A, B)
The PostgreSQL driver tries to figure out the type of the parameters to tell those parameters directly to the PostgreSQL Server. This is necessary that the PostgreSQL server is able to compare fields. In case of a java.sql.Timestamp the PostgreSQL driver is just not able to do it since there are two matching fields for … Read more