DB2 常用的SQL

DB2命令：

启动和停止 DB2 管理服务器：db2admin start  db2admin stop

查看DB2 管理服务器（DAS）：db2admin

配置 DB2 管理服务器（DAS）：db2 get admin cfg   ，

                                                               db2 update admin cfg using ...，

                                                                db2 reset admin cfg

 

 

 

 

SQL--DDL语句：

对新表定义生成列

   CREATE TABLE t1 (column1 vhsr(2),
                                      column2 vhsr(2),
                                      column3 DOUBLE GENERATED ALWAYS AS (column1 ||column2),
                                      column4 GENERATED ALWAYS AS
                                         (CASE WHEN column1 =column2 THEN 1 ELSE 0 END));

创建视图：    CREATE VIEW EMP_VIEW (DA00NAME, DA00NUM, PHONENO)
                          AS SELECT LASTNAME, EMPNO, PHONENO FROM EMPLOYEE
                          WHERE WORKDEPT = 'A00'
                           WITH CHECK OPTION

创建具体化查询表：CREATE TABLE  DB2ADMIN.MQT_TEST
                                      AS (select * from emp e ,dept d where e.deptno=d.deptno)
                                     DATA INITIALLY DEFERRED
                                      REFRESH DEFERRED
                                     ENABLE QUERY OPTIMIZATION
                                     MAINTAINED BY SYSTEM
                                     DATA CAPTURE NONE
                                     IN "USERSPACE1";

创建别名：CREATE ALIAS WORKERS FOR EMPLOYEE

创建索引：CREATE UNIQUE  INDEX <name> ON <table_name> (<column_name>)、

创建用户定义的单值类型： CREATE DISTINCT TYPE <distince_type_name> AS <value> WITH COMPARISONS

创建临时表：   DECLARE GLOBAL TEMPORARY TABLE gbl_temp
                            LIKE empltabl
                            ON COMMIT DELETE ROWS
                             NOT LOGGED
                             IN usr_tbsp

创建序列：  CREATE SEQUENCE order_seq
      START WITH 1
      INCREMENT BY 1
      NOMAXVALUE
      NOCYCLE
      CACHE 2

在多个表空间中创建表：

CREATE TABLE EMP_PHOTO
      (EMPNO        CHAR(6)      NOT NULL,
       PHOTO_FORMAT VARCHAR(10)  NOT NULL,
       PICTURE      BLOB(100K) )
   IN RESOURCE
   INDEX IN RESOURCE_INDEXES
   LONG  IN RESOURCE_PHOTO

创建触发器：

   CREATE TRIGGER NEW_HIRED
      AFTER INSERT ON EMPLOYEE
      FOR EACH ROW
      UPDATE COMPANY_STATS SET NBEMP = NBEMP+1;

 

收集目录统计信息：RUNSTATS ON TABLE BABEL.D_ZT AND INDEXES ALL;