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SQLize.online is a free online SQL environment for quickly running, experimenting with and sharing code.
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CREATE TABLE NCC ( MaNCC CHAR(10) PRIMARY KEY, TenNCC NVARCHAR(100), Diachi NVARCHAR(200), SDT VARCHAR(15) ); -- Bảng nhân viên CREATE TABLE NHANVIEN ( MaNV CHAR(10) PRIMARY KEY, TenNV NVARCHAR(100), Chucvu NVARCHAR(50) ); -- Bảng thuốc CREATE TABLE THUOC ( Mathuoc CHAR(10) PRIMARY KEY, Tenthuoc NVARCHAR(100), DVtinh NVARCHAR(20), Soluong INT ); -- Bảng hóa đơn nhập CREATE TABLE HDNHAP ( MaHDN CHAR(10) PRIMARY KEY, MaNCC CHAR(10), MaNV CHAR(10), Ngaynhap DATE DEFAULT GETDATE(), FOREIGN KEY (MaNCC) REFERENCES NCC(MaNCC), FOREIGN KEY (MaNV) REFERENCES NHANVIEN(MaNV) ); -- Bảng chi tiết hóa đơn nhập CREATE TABLE CTHDNHAP ( MaHDN CHAR(10), Mathuoc CHAR(10), SLnhap INT, DGnhap MONEY, PRIMARY KEY (MaHDN, Mathuoc), FOREIGN KEY (MaHDN) REFERENCES HDNHAP(MaHDN), FOREIGN KEY (Mathuoc) REFERENCES THUOC(Mathuoc) ); CREATE TRIGGER Chen_NCC ON NCC INSTEAD OF INSERT AS BEGIN IF EXISTS( SELECT 1 FROM NCC n JOIN INSERTED i ON n.TenNCC=i.TenNCC AND n.SDT=i.SDT ) BEGIN RAISERROR(N'TRUNG!',16,1) RETURN END INSERT INTO NCC(MaNCC,TenNCC,Diachi,SDT) SELECT MaNCC,TenMCC,Diachi,SDT FROM INSERTED END GO CREATE FUNCTION Tongnhap(@Mathuoc CHAR(4)) RETURNS MONEY AS BEGIN DECLARE @Tong MONEY SELECT @Tong=SUM(SLnhap*DGnhap) WHERE Mathuoc=@Mathuoc RETURN ISNULL(@Tong,0) END
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MySQL 8.0
MySQL 8.0 Sakila (ReadOnly)
MySQL 9.3.0
MariaDB 11.4
MariaDB 11.8
MariaDB 10
MariaDB 10 Sakila (ReadOnly)
SQLite 3
SQLite 3 Preloaded
PostgreSQL 10 Bookings (ReadOnly)
PostgreSQL 13
PostgreSQL 14
PostgreSQL 15
PostgreSQL 16
PostgreSQL 17
MS SQL Server 2017
MS SQL Server 2019
MS SQL Server 2022
MS SQL Server 2022 AdventureWorks (ReadOnly)
Firebird 4.0
Firebird 4.0 (Employee)
Oracle Database 19c (HR)
Oracle Database 21c
Oracle Database 23c Free
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