String handling routines Delphi syntax: function QuotedStr(const S: string): string; Description Use QuotedStr to convert the string S to a quoted string. A single quote character (') is inserted at the beginning and end of S, and each single quote character in the string is repeated. Note...
pub pc_banner_img:Option<String>,pub h5_banner_img:Option<String>,pub sort:Option<String>,pub status:Option<i32>,pub remark:Option<String>,pub create_time:Option<NaiveDateTime>,pub version:Option<i32>,pub delete
IDatabaseMetaData.IdentifierQuoteString Property Reference Feedback Definition Namespace: Java.Sql Assembly: Mono.Android.dll Returns the string used to quote SQL identifiers. C# publicstring? IdentifierQuoteString { [Android.Runtime.Register("getIdentifierQuoteString","()Ljava/lang/String;","GetGetIden...
CREATE TABLE "my table" ( "column 1" CHAR(10) ) SELECT COUNT(*) FROM "my table" WHERE "column 1" = 'abc' If you want to write a single quote character inside a string literal, you must write 2 single quotes: ... WHERE comment = 'John''s house' When writing static SQL in y...
聚合函数对一组值执行计算,并返回单个值。除了 COUNT 以外,聚合函数都会忽略空值。聚合函数经常与 SELECT 语句的 GROUP BY 子句一起使用。
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SQL_MAX_TABLES_IN_SELECT SQL_MAX_USER_NAME_LEN 标量函数信息 InfoType 参数的以下值返回有关数据源和驱动程序支持的标量函数的信息。 有关标量函数的详细信息,请参阅 附录E:标量函数。 SQL_CONVERT_FUNCTIONS SQL_NUMERIC_FUNCTIONS SQL_STRING_FUNCTIONS SQL_SYSTEM_FUNCTIONS SQL_TIMEDATE_ADD_INTERVALS SQL_TIME...
-> SELECT quote(text_fld) -> FROM string_tbl; 2.9.7.3. 在检索数据用于数据导出时,可以对所有非系统生成的字符列(比如customer_notes列)使用quote()函数 2.10. 包含特殊字符 2.10.1. SQL Server和MySQL服务器包含内建函数char() 2.10.2. Oracle Database用户可以使用chr()函数 2.10.3. 用于从ASCII字符集...
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QUOTENAME (<’character_expression’>[, quote_ character]) 其中quote_ character 标明括字符串所用的字符,缺省值为“[]”。 2、REPLICATE() 返回一个重复character_expression 指定次数的字符串。 REPLICATE (character_expression integer_expression) 如果integer_expression 值为负值,则返回NULL 。 3、REVERSE()...