- SQL to SequoiaDB shell to Java
SQL to SequoiaDB shell to Java
SequoiaDB 的查询用 json(bson)对象表示,下表以例子的形式显示了 SQL 语句,SequoiaDB shell 语句和 SequoiaDB Java 驱动程序语法之间的对照。
SQL | SequoiaDB shell | Java Driver |
---|---|---|
insert into bar( a, b) values( 1, -1 ) | db.foo.bar.insert( { a: 1, b: -1 } ) | bar.insert( "{ 'a': 1, 'b': -1 }" ) |
select a,b from bar | db.foo.bar.find( null, { a: "", b: "" } ) | bar.query( "", "{ 'a': '', 'b': '' }", "", "" ) |
select from bar | db.foo.bar.find() | bar.query() |
select from bar where age=20 | db.foo.bar.find( { age: 20 } ) | bar.query( "{ 'age': 20 }", "", "", "") |
select from bar where age=20 order by name | db.foo.bar.find( { age: 20 } ).sort( { name: 1 } ) | bar.query( "{ 'age': 20 }", "", "{ 'name': 1 }", "" ) |
select from bar where age > 20 and age < 30 | db.foo.bar.find( { age: { $gt: 20, $lt: 30 } } ) | bar.query( "{ 'age': { '$gt': 20, '$lt': 30 } }", "", "", "") |
create index testIndex on bar(name) | db.foo.bar.createIndex( "testIndex", { name: 1 }, false ) | bar.createIndex( "testIndex", "{ 'name': 1 }", false, false ) |
select from bar limit 20 offset 10 | db.foo.bar.find().limit( 20 ).skip( 10 ) | bar.query( "", "", "", "", 10, 20 ) |
select count() from bar where age > 20 | db.foo.bar.find( { age: { $gt: 20 } } ).count() | bar.getCount( "{ 'age': { '$gt': 20 } }" ) |
update bar set a=a+2 where b=-1 | db.foo.bar.update( { $inc: { a: 2 } }, { b: -1 } ) | bar.update( "{ 'b': -1 }", "{ '$inc': { 'a': 2 } }", "" ) |
delete from bar where a=1 | db.foo.bar.remove( { a: 1 } ) | bar.delete( "{ 'a': 1 }" ) |