Sql updating multiple rows Meet sext asian for chat and c2c free
I have a SQLite database with table my Table and columns id, pos X, pos Y.
The number of rows changes constantly (might increase or decrease).
But in many cases this only provides a modest improvement as each UPDATE operation still requires a round-trip communication with the database server.
In the case where the application server and database server are on different hosts, the round-trip will involve network latency as well.
I am trying to understand how to UPDATE multiple rows with different values and I just don't get it.
The solution is everywhere but to me it looks difficult to understand.
A requirement arises in many systems to update multiple SQL database rows.
For small numbers of rows requiring updates, it can be adequate to use an UPDATE statement for each row that requires an update.
I have about 60,000 rows that I'm needing to update the information from column_a to column_b.
For example, 60,000 customers need their arrival_time to match their departure_time.
Most systems provide utilities for bulk load, though Second - And this is somewhat RDBMS dependent as well, you could construct a dynamic update statement.
In this case, where the WITH Tmp(id, px, py) AS (VALUES(id1, news Pos X1, new Pos Y1), (id2, news Pos X2, new Pos Y2), .........................
My SQL allows a more readable way to combine multiple updates into a single query.Tags: Adult Dating, affair dating, sex dating