Connect and share knowledge within a single location that is structured and easy to search. Laravel DB:raw with Union I have the following querys which I need to unoin them but I'm getting the following error: 'message': 'Method IlluminateSupportCollection::getBindings does not exist.'
- Introduction
- Running Raw SQL Queries
Introduction
Laravel makes interacting with databases extremely simple across a variety of database backends using either raw SQL, the fluent query builder, and the Eloquent ORM. Currently, Laravel supports four databases:
Configuration
The database configuration for your application is located at
config/database.php
. In this file you may define all of your database connections, as well as specify which connection should be used by default. Examples for most of the supported database systems are provided in this file.By default, Laravel's sample environment configuration is ready to use with Laravel Homestead, which is a convenient virtual machine for doing Laravel development on your local machine. Of course, you are free to modify this configuration as needed for your local database.
Laravel Db Raw Sql
SQLite Configuration
After creating a new SQLite database using a command such as
touch database/database.sqlite
, you can easily configure your environment variables to point to this newly created database by using the database's absolute path:SQL Server Configuration
Laravel supports SQL Server out of the box; however, you will need to add the connection configuration for the database to your
config/database.php
configuration file:Read & Write Connections
Sometimes you may wish to use one database connection for SELECT statements, and another for INSERT, UPDATE, and DELETE statements. Laravel makes this a breeze, and the proper connections will always be used whether you are using raw queries, the query builder, or the Eloquent ORM.
To see how read / write connections should be configured, let's look at this example:
Note that two keys have been added to the configuration array:
read
and write
. Both of these keys have array values containing a single key: host
. The rest of the database options for the read
and write
connections will be merged from the main mysql
array.You only need to place items in the
read
and write
arrays if you wish to override the values from the main array. So, in this case, 192.168.1.1
will be used as the host for the 'read' connection, while 192.168.1.2
will be used for the 'write' connection. The database credentials, prefix, character set, and all other options in the main mysql
array will be shared across both connections.Using Multiple Database Connections
When using multiple connections, you may access each connection via the
connection
method on the DB
facade. The name
passed to the connection
method should correspond to one of the connections listed in your config/database.php
configuration file:You may also access the raw, underlying PDO instance using the
getPdo
method on a connection instance:Running Raw SQL Queries
Once you have configured your database connection, you may run queries using the
DB
facade. The DB
facade provides methods for each type of query: select
, update
, insert
, delete
, and statement
.Running A Select Query
To run a basic query, you may use the
select
method on the DB
facade:The first argument passed to the
select
method is the raw SQL query, while the second argument is any parameter bindings that need to be bound to the query. Typically, these are the values of the where
clause constraints. Parameter binding provides protection against SQL injection.The
select
method will always return an array
of results. Each result within the array will be a PHP StdClass
object, allowing you to access the values of the results:Using Named Bindings
Instead of using
?
to represent your parameter bindings, you may execute a query using named bindings:Running An Insert Statement
To execute an
insert
statement, you may use the insert
method on the DB
facade. Like select
, this method takes the raw SQL query as its first argument and bindings as its second argument:Running An Update Statement
The
update
method should be used to update existing records in the database. The number of rows affected by the statement will be returned:Running A Delete Statement
The
delete
method should be used to delete records from the database. Like update
, the number of rows affected will be returned:Running A General Statement
Some database statements do not return any value. For these types of operations, you may use the
statement
method on the DB
facade:Listening For Query Events
If you would like to receive each SQL query executed by your application, you may use the
listen
method. This method is useful for logging queries or debugging. You may register your query listener in a service provider:Database Transactions
Laravel Db Raw Insert
You may use the
transaction
method on the DB
facade to run a set of operations within a database transaction. If an exception is thrown within the transaction Closure
, the transaction will automatically be rolled back. If the Closure
executes successfully, the transaction will automatically be committed. You don't need to worry about manually rolling back or committing while using the transaction
method:Handling Deadlocks
Db Raw Laravel Insert
The
transaction
method accepts an optional second argument which defines the number of times a transaction should be reattempted when a deadlock occurs. Crusader kings 3 ios. Once these attempts have been exhausted, an exception will be thrown:Manually Using Transactions
Adguard surf shark tanks. If you would like to begin a transaction manually and have complete control over rollbacks and commits, you may use the
beginTransaction
method on the DB
facade:You can rollback the transaction via the
rollBack
method:Lastly, you can commit a transaction via the
commit
method:{tip} Using the
DB
facade's transaction methods also controls transactions for the query builder and Eloquent ORM.