hire_dateDATEDEFAULTCURRENT_DATE, salaryNUMERIC(10,2)CHECK(salary>0) ); 在这个示例中: emp_id是自增的主键。 first_name和last_name是非空的字符串列。 hire_date的默认值为当前日期。 salary列必须大于零。 5.2 创建表与外键约束 创建一个订单表,并与员工表建立外键关系: CREATETABLEorders ( order_id...
CREATETABLEemployees(emp_idSERIALPRIMARYKEY,first_nameVARCHAR(50)NOTNULL,last_nameVARCHAR(50)NOTNULL,hire_dateDATEDEFAULTCURRENT_DATE,salaryNUMERIC(10,2)CHECK(salary>0)); 在这个示例中: emp_id是自增的主键。 first_name和last_name是非空的字符串列。 hire_date的默认值为当前日期。 salary列必须大于...
CREATE SCHEMA [HR]; GO CREATE TABLE [HR].[Employees] ( EmployeeID INT NOT NULL PRIMARY KEY, Salary MONEY NOT NULL, ValidFrom DATETIME2 GENERATED ALWAYS AS ROW START HIDDEN NOT NULL, ValidTo DATETIME2 GENERATED ALWAYS AS ROW END HIDDEN NOT NULL, PERIOD FOR SYSTEM_TIME (ValidFrom, ValidTo...
CREATE SCHEMA [HR]; GO CREATE TABLE [HR].[Employees] ( EmployeeID INT NOT NULL PRIMARY KEY, Salary MONEY NOT NULL, ValidFrom DATETIME2 GENERATED ALWAYS AS ROW START HIDDEN NOT NULL, ValidTo DATETIME2 GENERATED ALWAYS AS ROW END HIDDEN NOT NULL, PERIOD FOR SYSTEM_TIME (ValidFrom, ValidTo...
CREATE SCHEMA [HR]; GO CREATE TABLE [HR].[Employees] ( EmployeeID INT NOT NULL PRIMARY KEY, Salary MONEY NOT NULL, ValidFrom DATETIME2 GENERATED ALWAYS AS ROW START HIDDEN NOT NULL, ValidTo DATETIME2 GENERATED ALWAYS AS ROW END HIDDEN NOT NULL, PERIOD FOR SYSTEM_TIME (ValidFrom, ValidTo...
CREATE SCHEMA [HR]; GO CREATE TABLE [HR].[Employees] ( EmployeeID INT NOT NULL PRIMARY KEY, Salary MONEY NOT NULL, ValidFrom DATETIME2 GENERATED ALWAYS AS ROW START HIDDEN NOT NULL, ValidTo DATETIME2 GENERATED ALWAYS AS ROW END HIDDEN NOT NULL, PERIOD FOR SYSTEM_TIME (ValidFrom, ValidTo...
CREATETABLESALARYASSELECTID,SALARYFROMCUSTOMERS; This will create a new table SALARY which will have the following structure − FieldTypeNullKeyDefaultExtra IDint(11)NOPRINULL SALARYdecimal(18,2)YESNULL Print Page Previous Next Advertisements
I cannot figure it out. I am trying to scrape a table from the website CapWages - NHL Salary Cap Data which will scrape the first 50 rows but because the website makes you click next page, it will not display the next ones. Normally, websites add to the url to advance the page....
hive>CREATETABLEIFNOTEXISTSemployee ( eidint, name String, salary String, destination String) COMMENT ‘Employee details’ ROW FORMAT DELIMITED FIELDS TERMINATEDBY‘\t’ LINES TERMINATEDBY‘\n’ STOREDASTEXTFILE; 译注:目前我使用的脚本样例如下:按照dt 字段进行分区,这个后续有一篇专门讲到了分区,你可以...
CREATE TABLE dbo.trig_example ( id INT, name VARCHAR(12), salary MONEY) ; GO -- Create the trigger. CREATE TRIGGER dbo.trig1 ON dbo.trig_example FOR INSERT AS IF (SELECT COUNT(*) FROM INSERTED WHERE salary > 100000) > 0 BEGIN print 'TRIG1 Error: you attempted to insert a salary...