012.Oracle数据库，字符串文本大小写转换，转大写，转小写，首字母大写

/*转大写*/
SELECT 
    UPPER(TITLE_EN)
FROM
    ME_EO 
WHERE
    ( 
        ISSUE_DATE BETWEEN to_date( ‘2017-02-04‘, ‘yyyy-MM-DD‘ ) AND to_date( ‘2017-02-09‘, ‘yyyy-MM-DD‘ )    
      AND ( ROWNUM <= 1 )    
    )
    ORDER BY ATA ASC     
;

/*转小写*/
SELECT 
    LOWER(TITLE_EN)
FROM
    ME_EO 
WHERE
    ( 
        ISSUE_DATE BETWEEN to_date( ‘2017-02-04‘, ‘yyyy-MM-DD‘ ) AND to_date( ‘2017-02-09‘, ‘yyyy-MM-DD‘ )    
      AND ( ROWNUM <= 1 )    
    )
    ORDER BY ATA ASC     
;

/*首字母大写*/
SELECT 
    INITCAP(TITLE_EN)
FROM
    ME_EO 
WHERE
    ( 
        ISSUE_DATE BETWEEN to_date( ‘2017-02-04‘, ‘yyyy-MM-DD‘ ) AND to_date( ‘2017-02-09‘, ‘yyyy-MM-DD‘ )    
      AND ( ROWNUM <= 1 )    
    )
    ORDER BY ATA ASC     
;