[i].StrLen_or_Ind)); // all catalogs query printf( "A list of names of all catalogs\n" ); retCode = SQLTables( hstmt, (SQLCHAR*)SQL_ALL_CATALOGS, SQL_NTS, (SQLCHAR*)"", SQL_NTS, (SQLCHAR*)"", SQL_NTS, (SQLCHAR*)"", SQL_NTS ); for ( retCode = SQLFetch(hstmt) ; ...
SQL Server용 Microsoft JDBC Driver 7.0은 새 연결 속성 cancelQueryTimeout을 도입합니다. 이 속성은 queryTimeout 및 java.sql.Connection 개체의 java.sql.Statement을 취소합니다. Azure Key Vault 공급자 생성자 추가 SQL Server용 Microso...
SQL_NUMERIC_FUNCTIONS SQL_STRING_FUNCTIONS SQL_SYSTEM_FUNCTIONS SQL_TIMEDATE_ADD_INTERVALS SQL_TIMEDATE_DIFF_INTERVALS SQL_TIMEDATE_FUNCTIONS Conversion Information The following values of the InfoType argument return a list of the SQL data types to which the data source can convert the specified SQL...
其它函数 String Functions:https://prestodb.io/docs/current/functions/string.html Binary Functions:https://prestodb.io/docs/current/functions/binary.html from_utf8(binary) → varchar# Decodes a UTF-8 encoded string from binary. Invalid UTF-8 sequences are replaced with the Unicode replacement c...
Query data Reporting & Analytics Security Tools Tutorials SQL Server on Linux SQL on Azure Azure Arc Resources Reference Azure Data CLI azcli Database samples Errors & events Event classes Native interfaces System catalog views System compatibility views System dynamic management views System...
show tables;show databases;show partitions;show functions;describe extended table_name dot col_name; DDL(Data Defination Language):数据库定义语言 建表: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 CREATE[EXTERNAL]TABLE[IFNOTEXISTS]table_name[(col_name data_type[COMMENTcol_comment],...)][...
PARTITION BY 表示将数据先按 part_list 进行分区 ORDER BY 表示将各个分区内的数据按 order_list 进行排序 FRAME 表示当前分区内如何选择窗口 怎么去比较清楚的理解这些概念呢? 首先我们可以看下MySQL的官方文档对于窗口函数的定义,写的非常精炼: window functions is, for each row from a query, perform a calc...
[i].StrLen_or_Ind)); // all catalogs query printf( "A list of names of all catalogs\n" ); retCode = SQLTables( hstmt, (SQLCHAR*)SQL_ALL_CATALOGS, SQL_NTS, (SQLCHAR*)"", SQL_NTS, (SQLCHAR*)"", SQL_NTS, (SQLCHAR*)"", SQL_NTS ); for ( retCode = SQLFetch(hstmt) ; ...
LOCATION 是指定外部表的存储路径,MANAGEDLOCATION 是指定管理表的存储路径(hive 4.0.0 才支持),官方建议默认就行,让所有的表都在一个根目录下。 例子 代码语言:javascript 代码运行次数:0 运行 AI代码解释 create database myhive;create databaseifnot exists myhive; ...
The next example uses two aggregate functions in the same query. Because some employees are paid hourly and others are on salary, you want to retrieve the average value for both PAYRATE and SALARY. SELECT AVG(PAYRATE) AS AVG_PAYRATE, AVG(SALARY) AS AVG_SALARY FROM EMPLOYEES; AVG_PAYRATE...