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• Untuk menambah field diakhir : alter table (nama table) add rak varchar(5);
• Untuk menambah field diawal : alter table (nama table) add no_urut int(2) first;
• Untuh menambah field di tengah : alter table (nama table) add satuan varchar(20) after jns_barang;
• Untuk mengubah data pada field : alter table (nama table) change jml jumlah int(6);
• Untuk mengubah type data : alter table (nama table) change hrg_brg hrg_brg int(7);
• Untuk mengubah null : alter table (nama table) modify nm_brg char(25) not null;
• Untuk memberi kunci primary pada key : alter table (nama table) add primary key (rak);
• Untuk memberi kunci kedua pada key : alter table (nama table) add unique key (rak);
• Untuk mengubah default : alter table (nama table) alter jns_barang set default "makanan";
• Untuk menghapus table field : alter table (nama table) drop rak;
• Untuk memasukan data pada field: insert into barang(no_urut,kd_brg,nm_brg,jns_barang,Satuan,hrg_brg)values('3','INOOE','Superpel','Obat pel','5','4300');
• Untuk melihat data field : select*from barang; / select nm_brg,jns_barang from barang; / select jns_barang,hrg_brg from barang where jns_barang='makanan';
• Untuk mengganti nama dalam data : update barang set nm_brg='mie sedap' where kd_brg='INOOI';
• Untuk mengahapus nama dalam data : delete from pelanggan where nama='Surya Saputra';
• Untuk perkalian : select (tarif*jml_pakai) as tot_bayar from rek_listrik;
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