大约有 3,551 项符合查询结果（耗时：0.0306秒） [XML]
Using LINQ to concatenate strings
...t takes a collection of values and returns a scalar value. Examples from T-SQL include min, max, and sum. Both VB and C# have support for aggregates. Both VB and C# support aggregates as extension methods. Using the dot-notation, one simply calls a method on an IEnumerable object.
Remember that agg...
How to load db:seed data into test database automatically?
...est:load is not executed if you have config.active_record.schema_format = :sql (db:test:clone_structure is)
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IsNothing versus Is Nothing
...d to use the Is Nothing version partially from using it as much as I do in SQL.
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Include constant in string without concatenating
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This is the one I use most, when I have a bunch of crazy SQL strings to compose. Also... passive-aggressive much? ;-)
– Beejor
Jun 5 '15 at 3:23
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Spring Data: “delete by” is supported?
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@Modifying annotation to the rescue. You will need to provide your custom SQL behaviour though.
public interface UserRepository extends JpaRepository<User, Long> {
@Modifying
@Query("delete from User u where u.firstName = ?1")
void deleteUsersByFirstName(String firstName);
}
Up...
Is there a JSON equivalent of XQuery/XPath?
...ipes. The jq FAQ has pointers to tutorials and the like.
jq is also like SQL in that it supports CRUD operations, though the jq processor never overwrites its input. jq can also handle streams of JSON entities.
Two other criteria you might wish to consider in assessing a JSON-oriented query langu...
Java JDBC - How to connect to Oracle using Service Name instead of SID
...give back and help others with a complete example. Here goes:
import java.sql.*;
public class MyDBConnect {
public static void main(String[] args) throws SQLException {
try {
String dbURL = "jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=whatE...
Sequelize, convert entity to plain object
...Sequelize somehow unflattens the result into objects. The results from the sql query are already flattened. I've found it useful a few times to get a flat result... +1 for this answer.
– PRS
Sep 6 '16 at 8:02
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Setting the default value of a DateTime Property to DateTime.Now inside the System.ComponentModel De
...sue for me was when I wanted to add a record directly into the table(using SQL) I had to provide the date(or leave it NULL). This is a much better solution. Thanks.
– Storm Muller
Sep 12 '18 at 18:32
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?
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In hibernate you need not bother about how to create table in SQL and you need not to remember connection ,prepared statement like that data is persisted in a database. So, basically it makes a developer's life easy.
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