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std::string length() and size() member functions
...ts, @Naveen, while fans of Perl's "There's more than one way to do it" (or SQL's syntax with a bazillion optional "noise words" giving umpteen identically equivalent syntactic forms to express one concept) will no doubt be complaining that Ruby, and especially C++, just don't go far enough in offeri...
Decimal precision and scale in EF Code First
...t I'm find out now that a property of type System.Decimal gets mapped to a sql column of type decimal(18, 0).
16 Answers
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@Basic(optional = false) vs @Column(nullable = false) in JPA
...d in
memory by the Persistence Provider and
an exception raised before SQL is sent
to the database otherwise when using
'updatable=false' 'optional'
violations would never be reported.
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ERROR: permission denied for sequence cities_id_seq using Postgres
...new at postgres (and at database info systems all in all). I ran following sql script on my database:
4 Answers
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How do I use a custom Serializer with Jackson?
...er should be something like this:
import java.io.IOException;
import java.sql.Timestamp;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.Serialize...
Hibernate: Automatically creating/updating the db tables based on entity classes
...ve.autodetection" value="class"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hbm2ddl.auto" value="create-drop"/>
<!-- without below table was not created -->
<property name=...
How do I create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office?
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//Create a query and fill the data table with the data from the DB
string sql = "SELECT Whatever FROM MyDBTable;";
OleDbCommand cmd = new OleDbCommand(sql, con);
OleDbDataAdapter adptr = new OleDbDataAdapter();
adptr.SelectCommand = cmd;
adptr.Fill(dt);
con.Close();
//Add the table to the data se...
How to find a table having a specific column in postgresql
I'm using PostgreSQL 9.1. I have the column name of a table. Is it possible to find the table(s) that has/have this column? If so, how?
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How to add “on delete cascade” constraints?
In PostgreSQL 8 is it possible to add ON DELETE CASCADES to the both foreign keys in the following table without dropping the latter?
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What's the difference between JPA and Hibernate? [closed]
...P (Java Community Process)
Hibernate (in 2003) provided a way to abstract SQL and allow developers to think more in terms of persisting objects (ORM). You notify hibernate about your Entity objects and it automatically generates the strategy to persist them. Hibernate provided an implementation to ...