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NVL(EXPR1,EXPR2)NVL2(EXPR1,EXPR2,EXPR3)NULLIF(EXPR1,EXPR2)COALESCE(EXPR1,,..,EXPRn)decode NVLnvl(COMMISSION_PCT,0)如果第一个参数为null,则返回第二个参数如果第一个参数为非null,则 阅读全文
posted @ 2020-04-13 15:22
kakaisgood
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Your settings are fine. The last step is to split the spool and select statements into another script, as follows: SET head OFF;SET feed OFF;SET trims 阅读全文
posted @ 2020-04-13 14:43
kakaisgood
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If you do not have permission to create the directory object (and assuming that the directory object does not already exist), you'll need to send a re 阅读全文
posted @ 2020-04-13 11:45
kakaisgood
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https://blog.csdn.net/robinson_0612/article/details/17348067 a、使用UTL_FILE的主要步骤(使用directory方式) --先创建用于存放os文件的目录 scott@USBO> ho mkdir -p /u03/database/u 阅读全文
posted @ 2020-04-13 11:27
kakaisgood
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第三章PL/SQL 基础PL/SQL块结构 DECLARE BEGIN 必须 EXCEPTION END;必须 set serveroutput onBEGIN dbms_output.put_line('hello, everyone');END;/ 标量类型VARCHAR2/CHAR/NUMBE 阅读全文
posted @ 2020-04-13 10:37
kakaisgood
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