oracle 创建表同时添加注释

现在想通过pl/sql语句块执行，代码如下：

declare tableExist number;
begin
    Select count(1) into tableExist from all_tables where TABLE_NAME=‘WARNINGRECORD‘;
    if tableExist>0 then
        execute immediate ‘drop table WARNINGRECORD‘;
        return;
    end if;
    execute immediate ‘CREATE TABLE WARNINGRECORD(RecordID varchar(36) PRIMARY KEY NOT NULL)‘;
    execute immediate ‘COMMENT ON COLUMN WarningRecord.RecordID  IS ‘‘告警编号‘‘‘;
end;

oracle 创建表同时添加注释

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