ALTER TABLE emp ADD COLUMN new_column VARCHAR(50); 重新运行原始建表语句: 在做出上述更改后,重新运行你的CREATE TABLE语句,确保它现在能够成功执行,不会再次抛出“table 'emp' already exists”错误。 通过以上步骤,你应该能够解决“table 'emp' already exists”错误,并根据你的需求创建或修改表结构。
1 queries executed, 0 success, 1 errors, 0 warnings 查询:create table emp( id int(8) primary key not null, ename varchar(20) not null, eage int(3), esex varchar(2) ) 错误代码: 1050 Table 'emp' already exists 执行耗时 : 0 sec 传送时间 : 0 sec 总耗时 : 0.001 sec 1. 2. 3....
The table will be created in library QTEMP. FOR SYSTEM NAME system-object-identifier Identifies the system-object-identifier of the table. system-object-identifier must not be the same as a table, view, alias, or index that already exists at the current server. The system-object-identifier ...
Example 4: Create an EMPLOYEE2 table with an identity column named EMP_NO. Define the identity column so that Db2 for i will always generate the values for the column. Use the default value, which is 1, for the first value that should be assigned and for the incremental difference between...
CONSTRAINT CK_emp_id CHECK ( emp_id LIKE '[A-Z][A-Z][A-Z][1-9][0-9][0-9][0-9][0-9][FM]' OR emp_id LIKE '[A-Z]-[A-Z][1-9][0-9][0-9][0-9][0-9][FM]' ) This example specifies that the values must be within a specific list or follow a specified patte...
CREATE TYPE emp_t AS OBJECT (empno NUMBER, address CHAR(30)); CREATE TABLE emp OF emp_t ( empno PRIMARY KEY) OBJECT IDENTIFIER IS PRIMARY KEY; CREATE TABLE dept (dno NUMBER, mgr_ref REF emp_t SCOPE is emp); The next statements add a constraint and a user-defined REF column, both...
INSERT INTO emp.employee VALUES (7,'scott',23,'M'); INSERT INTO emp.employee VALUES (8,'raman',50,'M'); 4. Hive Drop Temporary Table Use DROP TABLE statement to drop a temporary table. Below is an example of how to drop a temporary table. DROP TABLE IF NOT EXISTS emp.employee...
CREATE TYPE employees_typ AS OBJECT (e_no NUMBER, e_address CHAR(30)); CREATE TABLE employees_obj_t OF employees_typ (e_no PRIMARY KEY) OBJECT IDENTIFIER IS PRIMARY KEY; You can subsequently reference the emp object table in either of the following two ways:...
To Create Temporary Table: CREATE TABLE #EmpDetails (id INT, name VARCHAR(25)) To Insert Values Into Temporary Table: INSERT INTO #EmpDetails VALUES (01, 'Lalit'), (02, 'Atharva') To Select Values from Temporary Table: SELECT * FROM #EmpDetails. ...
DECLARE GLOBAL TEMPORARY TABLE SESSION.TEMP_EMP (EMPNO CHAR(6) NOT NULL, SALARY DECIMAL(9, 2), BONUS DECIMAL(9, 2), COMM DECIMAL(9, 2)) ON COMMIT PRESERVE ROWS Example 2: Assume that base table USER1.EMPTAB exists and that it contains three columns, one of which is an identity ...