mysql中的保存字段發生的成績

mysql中的保存字段發生的成績。本站提示廣大學習愛好者：（mysql中的保存字段發生的成績）文章只能為提供參考，不一定能成為您想要的結果。以下是mysql中的保存字段發生的成績正文

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本文實例講述了python翻開文件並獲得文件相干屬性的辦法。分享給年夜家供年夜家參考。詳細剖析以下：

上面的代碼經由過程open函數翻開文件，並輸入文件名、翻開狀況、翻開形式等屬性

#!/usr/bin/python
# Open a file
fo = open("foo.txt", "wb")
print "Name of the file: ", fo.name
print "Closed or not : ", fo.closed
print "Opening mode : ", fo.mode
print "Softspace flag : ", fo.softspace

輸入成果：

Name of the file: foo.txt
Closed or not : False
Opening mode : wb
Softspace flag : 0

願望本文所述對年夜家的Python法式設計有所贊助。

��病弄定，整整一個上午外加下晝兩個小時，的確曾經到了抓狂的水平。的確要跪地苦思冥想，然則照樣沒有弄定這個毛病。
  把成績放在一邊，持續弄其他的器械····當在寫一個group by 語句時，忽然認識到，group 是mysql的一個保存字，就此成績水到渠成。切記切記，何等痛的融會啊

mysql的保存字段

在MySQL中，下表中的字顯式被保存。個中年夜多半字進制被尺度SQL用作列名和/或表名(例如，GROUP)。多數被保存了，由於MySQL須要它們，在MySQL中，當表名或字段名甚至數據庫名和保存字抵觸時，在sql語句裡可以用撇號（）括起來,當讓我們普通都盡可能少應用這些保存的字段。

ADD ALL ALTER ANALYZE AND AS ASC ASENSITIVE BEFORE BETWEEN BIGINT BINARY BLOB BOTH BY CALL CASCADE CASE CHANGE CHAR CHARACTER CHECK COLLATE COLUMN CONDITION CONNECTION CONSTRAINT CONTINUE CONVERT CREATE CROSS CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER CURSOR DATABASE DATABASES DAY_HOUR DAY_MICROSECOND DAY_MINUTE DAY_SECOND DEC DECIMAL DECLARE DEFAULT DELAYED DELETE DESC DESCRIBE DETERMINISTIC DISTINCT DISTINCTROW DIV DOUBLE DROP DUAL EACH ELSE ELSEIF ENCLOSED ESCAPED EXISTS EXIT EXPLAIN FALSE FETCH FLOAT FLOAT4 FLOAT8 FOR FORCE FOREIGN FROM FULLTEXT GOTO GRANT GROUP HAVING HIGH_PRIORITY HOUR_MICROSECOND HOUR_MINUTE HOUR_SECOND IF IGNORE IN INDEX INFILE INNER INOUT INSENSITIVE INSERT INT INT1 INT2 INT3 INT4 INT8 INTEGER INTERVAL INTO IS ITERATE JOIN KEY KEYS KILL LABEL LEADING LEAVE LEFT LIKE LIMIT LINEAR LINES LOAD LOCALTIME LOCALTIMESTAMP LOCK LONG LONGBLOB LONGTEXT LOOP LOW_PRIORITY MATCH MEDIUMBLOB MEDIUMINT MEDIUMTEXT MIDDLEINT MINUTE_MICROSECOND MINUTE_SECOND MOD MODIFIES NATURAL NOT NO_WRITE_TO_BINLOG NULL NUMERIC ON OPTIMIZE OPTION OPTIONALLY OR ORDER OUT OUTER OUTFILE PRECISION PRIMARY PROCEDURE PURGE RAID0 RANGE READ READS REAL REFERENCES REGEXP RELEASE RENAME REPEAT REPLACE REQUIRE RESTRICT RETURN REVOKE RIGHT RLIKE SCHEMA SCHEMAS SECOND_MICROSECOND SELECT SENSITIVE SEPARATOR SET SHOW SMALLINT SPATIAL SPECIFIC SQL SQLEXCEPTION SQLSTATE SQLWARNING SQL_BIG_RESULT SQL_CALC_FOUND_ROWS SQL_SMALL_RESULT SSL STARTING STRAIGHT_JOIN TABLE TERMINATED THEN TINYBLOB TINYINT TINYTEXT TO TRAILING TRIGGER TRUE UNDO UNION UNIQUE UNLOCK UNSIGNED UPDATE USAGE USE USING UTC_DATE UTC_TIME UTC_TIMESTAMP VALUES VARBINARY VARCHAR VARCHARACTER VARYING WHEN WHERE WHILE WITH WRITE X509 XOR YEAR_MONTH ZEROFILL