setCommand(MysqlCommand.COM_SLEEP); } (二)Parse ConnectProcessor 接收到 SQL 之后会进行 analyze ,Apache Doris SQL 解析使用的 Parse 是 Java CUP Parser,语法规则 定义的文件在 sql_parser.cup。 感兴趣的同学可以详细看一下 StatementBase 类 analyze 方法, 返回 List(这里主要是语法解析) 代码语言:...
-- Use a filtered condition to separate hot data in a rowstore table -- from "warm" data in a columnstore index. -- create the table CREATE TABLE orders ( AccountKey int not null, CustomerName nvarchar (50), OrderNumber bigint, PurchasePrice d...
UPDATEtablename[, ...]SET{[tablename.]colname=value}[, ...] [WHEREcondition1 [AND|ORcondition2][...]] 删除记录 DELETEFROMtablename [WHEREcondition1 [AND|ORcondition2][...]] 或: DELETEtablename1[, ...]FROMtablename1[, ...] [WHEREcondition1 [AND|ORcondition2][...]] 查询记录...
The SELECT statement just gives us a sample of the data in the table. We can use the TOP command to limit the number of rows returned. What is more interesting is thesp_spaceusedstored procedure. It tells us useful information such as reserved space, data space, and index space in kiloby...
(); #region BasicUnNormalPrice表 DataRow dr = dt.NewRow(); dr["specialPriceId"] = Convert.ToInt32(normalpriceid); dr["airCompany"] = airCompany; dt.Rows.Add(dr); #endregion } } //插入BasicNormalPrice表 sbc.DestinationTableName = "BasicUnNormalPrice"; sbc.WriteToServer(dt); //...
CREATE TABLE 建立两个子表,分别存入“广东”和“北京” postgres=# create table t_list_gd partition of t_native_list(f1 ,f2 , f3,f4) for values in ('广东'); NOTICE: Replica identity is neededforshard table, pleaseaddto this table through"alter table"command. ...
-- Execute a resumable online index create statement with MAXDOP=1 CREATE INDEX test_idx1 ON test_table (col1) WITH (ONLINE = ON, MAXDOP = 1, RESUMABLE = ON); -- Executing the same command again (see above) after an index operation was paused, resumes automatically the index create op...
问在table1上发生新插入时，table2中的SQL Create rowEN20160616更新 参考： http://www.runoob.com/...
CREATEPROCEDURE[dbo].[sp_InsertRows] @TestTvpasMyTableType READONLYASBEGININSERTINTOMyTable(mytext,num)SELECTmytext,numFROM@TestTvpENDGO 然后将前一个代码示例中的SqlCommand对象声明更改为以下内容。 C# SqlCommand cmd =newSqlCommand("sp_InsertRows", connection); cmd.CommandType = CommandType.StoredP...
BULKINSERTbing_covid_19_dataFROM'https://<data-lake>.blob.core.windows.net/public/curated/covid-19/bing_covid-19_data/latest/bing_covid-19_data.csv'WITH(FIRSTROW=2); 备注 替换为<data-lake>.blob.core.windows.net相应的 URL。