2、Which were the busiest years for 'John Travolta', show the year and the number of movies he made each year for any year in which he made more than 2 movies. SELECT yr,COUNT(title) FROM movie JOIN casting ON (movie.id=casting.movieid) JOIN actor ON (casting.actorid=actor.id) WH...
(13)Equatorial Guinea and Dominican Republic have all of the vowels (a e i o u) in the name. They don't count because they have more than one word in the name. Find the country that has all the vowels and no spaces in its name. You can use the phrase name NOT LIKE '%a%' to...
非标准使用转义字符(NONSTANDARD_USE_OF_ESCAPE_CHARACTER) 22010 非法指示器参数值(INVALID_INDICATOR_PARAMETER_VALUE) 22023 非法参数值(INVALID_PARAMETER_VALUE) 2201B 非法正则表达式(INVALID_REGULAR_EXPRESSION) 2201W LIMIT子句中行号非法(INVALID_ROW_COUNT_IN_LIMIT_CLAUSE) 2201X 结果集中行号非法(INVALID_ROW...
一个最常见的主键就是auto-incrementing integer(自增ID,每写入一行数据ID+1, 当然字符串,hash值等只要是每条数据是唯一的也可以设为主键. 借助主键(primary key)(当然其他唯一性的属性也可以),我们可以把两个表中具有相同 主键ID的数据连接起来(因为一个ID可以简要的识别一条数据,所以连接之后还是表达的同一条...
Case Conversion functions- Accepts character input and returns a character value. Functions under the category are UPPER, LOWER and INITCAP. UPPER function converts a string to upper case. LOWER function converts a string to lower case.
这些参数包括 查询提示的 number_of_rows 参数FAST、 查询提示的 number_of_processors 参数MAXDOP,以及 查询提示的 number 参数MAXRECURSION。参数化在单条 Transact-SQL 语句内发生。 即,批处理中的单条语句将参数化。 在编译之后,参数化查询将在它最初提交时所在的批的上下文中执行。 如果缓存了查询的执行计划,则...
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voidtransDemo(HiSqlClient sqlClient){intcount =10;stringtabname =typeof(H_Test02).Name; List lstdata = buildData10Col(count); sqlClient.Delete(tabname).ExecCommand();using(varsqlClt = sqlClient.CreateUnitOfWork()) { sqlClt.Insert(tabname, lstdata).ExecCommand(); sqlClt.Modi...
/// protected override string GenerateNonNullSqlLiteral(object value) { var stringValue = (string)value; var builder = new StringBuilder(); var start = 0; int i; int length; var openApostrophe = false; var lastConcatStartPoint = 0; var concatCount = 1; var concatStartList = new List<...
string SIMILAR TO pattern [ESCAPE escape-character] string NOT SIMILAR TO pattern [ESCAPE escape-character] SIMILAR TO操作符根据自己的模式是否匹配给定串而返回真或者假。 它和LIKE非常类似,只不过它使用 SQL 标准定义的正则表达式理解模式。 SQL 正则表达式是在LIKE标记和普通的正则表达式标记的奇怪的杂交。