摘要:
1.列转换 1:每个字母转成一行 SELECT SUBSTR(A.COLUMN1, LEV, 1) COLUMN1FROM ( SELECT 'AABDC' COLUMN1 FROM DUAL) A,(SELECT LEVEL LEV FROM DUAL CONNECT BY LEVEL<=100) 阅读全文
摘要:
问题描述: Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for... 阅读全文