oracle判断是否包含字符串
一. oracle判断是否包含字符串的方法
1. contains，contains用法如下：select * from students where contains(address, 'beijing')
2. instr，instr的用法如下：select * from students where instr(address, 'beijing') > 0
3. like，使用like：select * from students where address like ‘%beijing%’
