• Oracle常用sql


    Oracle不像Sqlserver,并没有提供l默认约束,但提供了默认值,效果一样。
    --------------------------- 在建表时设置默认约束---------------------------

    create table t1 (tname varchar2(20) default 'yang');


    --------------------------- 在修改表时设置默认约束---------------------------

    alter table t1 modify (tname varchar2(20) default 'yang');


    --------------------------- 创建序列---------------------------
    create sequence ZHPT_P_USER_SEQ
    minvalue 1
    maxvalue 999999999
    start with 86283141
    increment by -3026
    nocache
    cycle
    order;
    --------------------------- 创建存储过程---------------------------

    CREATE OR REPLACE PROCEDURE create_table
    IS
    v_Cursor NUMBER;--定义游标
    v_CreateString VARCHAR2(100);--这个变量存放创建表的SQL语句。
    BEGIN
    v_Cursor := DBMS_SQL.OPEN_CURSOR;--打开游标
    v_CreateString := 'CREATE TABLE tp (id int,name varchar2(20))';--创建表的SQL语句。
    DBMS_SQL.PARSE(v_Cursor, v_CreateString, DBMS_SQL.V7);执行建表的SQL语句
    DBMS_SQL.CLOSE_CURSOR(v_Cursor);--关闭游标
    END create_table;

    --------------------------- 执行存储过程---------------------------

    execute create_table;

    ---------------------------创建函数执行从A表到B表一条一条导入数据并验证---------------------------

    create or replace function cux_user_imp(code out VARCHAR2) RETURN VARCHAR2 is
    /*
    作者:ocean
    主要功能:数据导入测试
    创建日期:2015年11月26日
    */
    cux_a varchar2(10); --姓名变量
    cux_i number;
    cux_user p_user_temp%rowtype;
    cursor cux_user_cr is
    select * from p_user_temp p where p.xb = '1';
    begin

    delete from p_user;
    commit;


    cux_i := 1;

    for cux_user in cux_user_cr loop

    cux_a := cux_user.name;

    if cux_a = 'lxx' then
    dbms_output.put_line(cux_a);

    elsif cux_a <> 'lxx' then

    insert into p_user
    (p_user.id,
    p_user.name,
    p_user.age,
    p_user.tel,
    p_user.csri,
    p_user.xb)
    values
    (cux_user.id,
    cux_user.name,
    cux_user.age,
    cux_user.tel,
    cux_user.csri,
    cux_user.xb
    );
    cux_i := cux_i + 1;
    dbms_output.put_line(to_char(cux_i) || ' ' || cux_user.name);
    commit;
    end if;

    end loop;

    return 'ok';

    end;

    --------------------------- 简单主键定义如下并设置为自增(只取出主键定义)---------------------------

    typeid int not null primary key identity(1,1),


    --------------------------- 表和序列的关系,是通过业务逻辑的SQL语句来维护---------------------------


    即:insert into table_name (column_name) values (seq_name.nextval);


    --------------------------- 向表中加时间字段默认值为系统时间---------------------------

    insert into table(j) values(to_date('2000-11-26 00:04:47','yyyy-mm-dd hh24:mi:ss'));
    create table test
    (id int,
    starttime date default sysdate not null );
    插入测试数据:
    insert into test (id) values (1);
    commit;


    --------------------------- 创建表的时候调用序列 需要写一个触发器---------------------------

    create or replace trigger 你的表名_tri
    before insert on 你用到的表
    for each row
    DECLARE
    BEGIN
    SELECT 你的序列名.nextval into :new.id from dual;
    end test_oo_tri;


    --------------------------- A表数据导入B表,如果长度不够截取---------------------------

    insert into test_PP(ID,NAME) select o.id,SUBSTR(o.name,0,3) from test_oo o;

    insert into pUser p (p.名,p.性别,p.年龄,p.电话) select substr(u.姓名,1,20),u.性别,u.年龄,u.电话 from User u
    说明:截取函数oracle中是substr,sqlserver中是substring
    不管大于不大于20长度全截取。

    --------------------------- A表数据导入B表---------------------------


    insert into ZHPT_P_USER select * from PUSER
    按字段插入
    Insert into B (字段1,字段2,字段3) select 字段1,字段2,字段3 from A;


    ---------------------------给一个表循环插入1000条数据---------------------------

    declare
    idx number(22) := 8;
    val varchar2(22) := 'test';
    begin
    loop
    idx := idx + 1;
    insert into abook2 values (idx, val || TO_CHAR( idx ) );
    exit when idx > 1000;
    end loop;
    end;

    --------------------------- 查询表中某个字段的值---------------------------

    select * from puser where XM='王茜红统计'

    --------------------------- 查询字段备注---------------------------

    select * from user_tab_comments where comments like '%处室%'

    --------------------------- 插入---------------------------

    Insert into table_name 字段 1,字段 2、、字段 n values (字段值 1,字段值 2、、字段值 n );

    INSERT INTO lxx VALUES(10,'ACCOUNTING','NEW YORK');

    --------------------------- 循环插入---------------------------
    begin
    for i in 1..10 loop
    insert into table_name values (...);
    end loop;
    end;

    --------------------------- 序列---------------------------

    AA3349_BFA001_SEQUENCE

    sql:

    1)-- Create sequence
    create sequence AA3349_BFA001_SEQUENCE
    minvalue 1
    maxvalue 999999999999999999999999999
    start with 81
    increment by 1
    cache 20;

    --------------------------- 修改表 字段 结构---------------------------
    alter table AA3350
    add constraint BFA001 primary key (BFA001)
    using index
    tablespace FSSR
    pctfree 10
    initrans 2
    maxtrans 255
    storage
    (
    initial 64K
    minextents 1
    maxextents unlimited
    );


    -- Add comments to the table
    comment on table AA3350
    is '文件审核表';
    -- Add comments to the columns
    comment on column AA3350.bfa303
    is '文号';
    comment on column AA3350.faf006
    is '审核日期';
    comment on column AA3350.faf007
    is '审核人';
    comment on column AA3350.faf008
    is '审核说明';
    comment on column AA3350.bfa314
    is '修订状态';
    comment on column AA3350.bfa001
    is '序号';

    -------------------------- 导入、导出--------------------------

    导入:imp 数据库名/数据库密码@服务 file=D:名称.dmp full=y
    导出:exp 数据库名/数据库密码@服务 file=D:名称.dmp

    ---------------------------建立表空间--------------------------


    CREATE TABLESPACE "FSSR"

    LOGGING

    DATAFILE 'D:oracleproduct10.2.0oradataorclFSSR.ora' SIZE 500M

    AUTOEXTEND ON NEXT 100M

    MAXSIZE UNLIMITED EXTENT MANAGEMENT LOCAL

    SEGMENT SPACE MANAGEMENT AUTO


    ------------------------ 更新字段-------------------------

    update 表名 set 字段名='更新数据'

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  • 原文地址:https://www.cnblogs.com/xinxin1994/p/5000261.html
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