SQL> create table emp1 as select * from emp where 1=2; SQL> insert into emp1 select * from emp; 传统方式数据 SQL> insert /*+ APPEND */ into emp1 select * from emp; 直接方式数据,必须commit后才能查看数据 【实验】直接路径插入数据 SQL>createtableemp1asselect*fromempwhere1=2; SQL>ins...
TRANSLATEReturns the string from the first argument after the characters specified in the second argument are translated into the characters specified in the third argument. TRIMRemoves leading and trailing spaces (or other specified characters) from a string ...
SELECT * from sysuser s where s.sysUseName = ‘RoBin空格’ 这三条语句均可以查询出那条记录。 官方文档上说是MySQL校对规则属于PADSPACE,对CHAR和VARCHAR值进行比较都忽略尾部空格,和服务器配置以及MySQL版本都没关系。 MySQL安装目录下有个doc目录(Windows),里面的 Data Types -> String Types -> The CHAR...
@Testvoid login() {String username="李明轩";String password="'or 1= '1 ";UserInfo login = userMapper.login(username, password);System.out.println(login==null?"失败":"成功");} 2.2.2: XML中的配置 select * from userinfo where username='${username}' and password='${password}' 2.2.3:...
"http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mappernamespace="com.sdbi.mapper.StudentMapper">SELECT sid, sname, age, cid FROM tb_student<trimprefix="WHERE"prefixOverrides="AND | OR"suffix="ORDER BY age"><iftest="cid != null"><!--cid就是参数对象的属性/参数Map的key-->AND cid ...
通过,SUM(CASE WHEN sb.sblb = '3' THEN 1 ELSE 0 END) AS 失效 FROM SBMP_SBXX sb JOIN FR_ZTJCXX ztjc ON ztjc.qylx is NOT NULL AND ztjc.qyzt = '1' AND ztjc.ssgq IS NOT NULL AND ztjc.ID = sb.ztid WHERE sb.rdsj = 'XXX'";List<String> result =newArrayList<String>()...
public static Ssql compile(String ssqlStr) { // 词法解析器 SsqlLexer lexer = new SsqlLexer(CharStreams.fromString(ssqlStr)); // 语法解析器 SsqlParser parser = new SsqlParser(new CommonTokenStream(lexer)); // 异常监听器 parser.addErrorListener(SsqlErrorListener.INSTANCE); // 语法树生成...
By default, the TRIM function removes the space character from both the start and the end of the string. This behavior is equivalent to LTRIM(RTRIM(@string)).To enable the optional LEADING, TRAILING, or BOTH positional arguments in SQL Server 2022 (16.x), you must enable database ...
hive(myhive)>usemyhive;--使用myhive数据库 hive(myhive)>createtablestu(idint,namestring); hive(myhive)>insertintostuvalues(1,"zhangsan"); hive(myhive)>insertintostuvalues(1,"zhangsan"),(2,"lisi");--一次插入多条数据 hive(myhive)>select*fromstu; hive建表时候的字段类型: 对decimal类型...
EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.liujh.mapper.UserMapper"><sql id="userFields">id,name,phone,create_time</sql>select<include refid="userFields"/>from user<where><iftest="id != null">ANDid=#{id}</if><iftest="name != null">ANDname=#{...