Kami berharap bahwa Anda menikmati presentasi ini . Untuk men-download , silahkan rekomendasi presentasi ini kepada teman-teman Anda dalam jaringan sosial . Tombol yang haris diklik terletak di bawah posting ini . Terima kasih . Tombol: Demo Komparasi Row dan Table Locking pada MySQL dengan Oracleg11 from Philo Mushofi El Haries MySQL – Latu – 13505019 – Mengunci dan Membuka Tabel -4 by catbasdatMei 30, 2007, 11:50 am Penguncian tabel secara permanen, terkadang diperlukan sekali ketika kita ingin melakukan backup maupun Penguncian secara permanen: FLUSH TABLES WITH READ LOCK; Selain penguncian secara permanen, kita juga dapat melakukan penguncian tabel yang sifatnya sementara, yaitu: Option selain READ adalah WRITE, Unlock tabel hanya bisa dilakukan oleh user yang mengunci tabel tersebut. Perintah unlock: Iklan Share this:Menyukai ini:Suka Memuat... TerkaitTinggalkan sebuah Komentar so far Tinggalkan komentar RSS feed for comments on this post. TrackBack URI Tinggalkan BalasanKetikkan komentar di sini... Isikan data di bawah atau klik salah satu ikon untuk log in: Email (wajib) (Alamat takkan pernah dipublikasikan) Nama (wajib) Situs web
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Δ A session releases all the tables locks with it at once. You can implicitly release the table locks. If the connection to the server terminates explicitly or implicitly all the locks will be released. You can release the locks of a table explicitly using the UNLOCK TABLES statement. SyntaxFollowing is the syntax of the MySQL UNLOCK TABLES statement − UNLOCK TABLES ExampleSuppose we have created a table that contains the sales details along with the contact details of the customers as shown below − mysql> CREATE TABLE SalesDetails ( ID INT, ProductName VARCHAR(255), CustomerName VARCHAR(255), DispatchDate date, DeliveryTime time, Price INT, Location VARCHAR(255), CustomerAge INT, CustomrtPhone BIGINT, DispatchAddress VARCHAR(255), Email VARCHAR(50) ); Now, let’s insert 2 records into the above created table using the INSERT statement as − mysql> insert into SalesDetails values(1, 'Key-Board', 'Raja', DATE('2019-09-01'), TIME('11:00:00'), 7000, 'Hyderabad', 25, '9000012345', 'Hyderabad – Madhapur', '[email protected]'); Query OK, 1 row affected (0.84 sec) mysql> insert into SalesDetails values(2, 'Mobile', 'Vanaja', DATE('2019-03-01'), TIME('10:10:52'), 9000, 'Chennai', 30, '90000123654', 'Chennai- TNagar', '[email protected]'); Query OK, 1 row affected (1.84 sec) If we want another table with just the contact details of the customer create a table as − mysql> CREATE TABLE CustContactDetails ( ID INT, Name VARCHAR(255), Age INT, Phone BIGINT, Address VARCHAR(255), Email VARCHAR(50) ); Following queries insets records into the CustContactDetails table using the INSERT INTO SELECT statement. Here, we are trying to insert records from the SALES_DETAILS table to CustContactDetails table. Here before the transfer, we are acquiring the write lock on the table to which we are inserting records and acquiring read lock on the table from which we are inserting records. Finally, after the transfer we are releasing the records. |