scholl inserts

Establishing a database connection def create_db_connect(): "" " brief info for:create_db_connect Establish database link Args:Return:Raise: " "" "conn = MySQLdb.connect (host ="Rm-uf6wz3f7kb8sx983zo.mysql.rds.aliyuncs.com", user ="Pv_cms", passwd ="[email protected]", port =3306, CharSet ="UTF8", db ="Pv_interaction_bigdata") return ConnInsert data: def insert_to_info(conn):cursor = conn.cursor () sql ="INSERT into info values (%s,%s) "L = [[' Liza ',' Mary '],[' dh ',' Lxy ']]# must be List

Label:? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 insert into Tb_People(uname,era,amount) values( ‘兆周‘,‘老年‘,‘10000‘) select @@identity --当运行完插入语句后，执行select @@identity就可得到自动生成的id --如果是sql server 最好用select SCOPE_IDENTITY() as id --因为@@identity全局的 select SCOPE_IDENTITY() as id select IDENT_CURRENT (‘Tb_People‘) select MAX(id) from Tb_People--SCOPE_IDENTITY --返回插入到同一作用域中的 IDENTITY 列内的最后一个 IDENTITY 值。一个作用域就是一个模块——存储过程、触发器、函数或批处理。因此，如果两个语句处于同一个存储过程、函数或批处理

Use INSERT INTO (field1,field2 ...) VALUES (' Val1 ', ' val2 ' ...) , an error occurs if there is a single quotation mark in the value.Processing method: Determine whether the Val1,val2 contains single quotation marks, if the single quotation marks, then the single quotation mark ' replaced with two single quotation marks '.Organize fields and field values into a hashtable, and then abstract a function getsqlbyhashtable () that organizes SQL statements:HashTable HT =new HashTable ();Ht.add (FIEL

Label:Note that you cannot omit any of the fields in the table. Include self-increment ID The principle is "table interpolation table" INSERT intoprod_attrSelectA.* from ( SELECT 5 asprod_id,1 asattr_id,'China Press' asAttr_valueUNION SELECT 5 asprod_id,2 asattr_id,'Tsinghua Press' asattr_value) asA Table structure MySQL Insert insert new fo

1 Declare @dt datetime,@today datetime,@a varchar(Max),@z datetime Set @a=02 Select @today=CONVERT(varchar( -),GETDATE(), -),@dt=@today3 while @a14 begin5 Select @today=CONVERT(varchar( -),GETDATE(), -)6 7 while @dt=@today8 begin9 InsertProjectmanageValues('installed BB'+@a,'Xiao Ming',' Daming','Engineering Supervision','is a',@dt,'2000-9-9','13527748096','13527748096','13527748096','13527748096','13527748096','13527748096')Ten Set @dt=DATEADD(SECOND,5,@dt) One End A Set @a=@a

1 Insert into Table(Field1,field2,...)Values(Value1,value2,...)--inserting A single piece of data2 3 Insert into Table(Field1,field2,...)SelectValue1,value2,...Union SelectValue1,value2,...--Insert multiple data, do not allow default4 5 Insert intoTable2 (Field1,field2,...)SelectField1,field2,... fromTable1--table 2 must be present6 7 SelectField1,field2,... intoTable2 fromTable1--CREATE table 2, copy table 1 data to table 2Several ways in which SQL Server

. parameters[1]. Value = _datatable.rows[i]["Pointtype"]. ToString (); Cmd. parameters[2]. Value = _datatable.rows[i]["Tempvalue"]. ToString (); Cmd. parameters[3]. Value = _datatable.rows[i]["Humivalue"]. ToString (); Cmd. parameters[4]. Value = _datatable.rows[i]["Ttime"]; Cmd. ExecuteNonQuery (); } trans.commit (); } Catch(Exception) {trans.

order by id desc limit) se Lect avg (load_15) from S) where Id=new.id;return new; END; $BODY $ LANGUAGE plpgsql VOLATILE cost 100; Using Pgsql to write a trigger function, the basic idea is actually update. Add a trigger to a tableCREATE TRIGGER Trg_status_loadavg_insert After insert in asset_serverstatus for each ROW EXECUTE PROCEDURE Fn_status_loada Vg_insert (); In this way, the implementation of a field is averaged in the PostgreSQL database and then inserted into another field, depending o

] [nvarchar] (a) not null,[detailage] [i NT] not null,[createtime] [datetime] is not NULL);Dbo. F_rtnstrbysplitindex is a custom scalar-valued function that returns the string corresponding to the first number of delimiters, such as dbo. F_rtnstrbysplitindex (' Jack|lilei|tom|nike ', 3) returns TomHere is the creation of the functionCreate function [dbo]. [F_rtnstrbysplitindex] (@procStr nvarchar (max), @splitStrIdx int) returns nvarchar (+) asbegindeclare @rtnStr nvarchar (+) DECLARE @ Currents

uniqueness, and improve import efficiency.When Unique_checks=1mysql> load Data infile '/home/mysql/film_test3.txt ' into table film_test4;Query ok,1587168 rows Affected (22.92 sec)records:1587168 deleted:0 skipped:0 warnings:0When unique_checks=0mysql> load Data infile '/home/mysql/film_test3.txt ' into table film_test4;Query ok,1587168 rows Affected (19.92 sec)records:1587168 deleted:0 skipped:0 warnings:0Turn off auto-commit to improve import efficiencyThe import efficiency can be improved by

()); inPst.setstring (2, Entity.getarea ()); thePst.setstring (3, Entity.gettitle ()); thePst.setstring (4, Entity.getlink ()); AboutPst.setobject (5,NewJava.sql.Timestamp (NewDate (). GetTime ()));//Update Time thePst.setobject (6,NewJava.sql.Timestamp (NewDate (). GetTime ()));//Last update Time the76Pst.addbatch (); the77 } +78//Perform a batch update -79Pst.executebatch (); the80conn.commit ();BayiBayi System.out.println (NewJava.sql.Timestamp (NewDate (). GetTime ()) +

two doubts, please advise:1. If the entity must be obtained at the time of update and delete, and then the operation can be performed, I try to get the entity in the database without going to the databases at the time of update, but declare an entity myself and then delete it, but it fails.2. In the generated update and delete conditional statements contain [email protected] and [email protected] statements, supposedly link to SQL already know the ID is the only primary key, why also pass these

primary key, so if you can create a primary key for the table, you can use this advantage to improve the efficiency of importing data. Perform set unique_checks=0 before importing data, turn off uniqueness Check, execute set unique_checks=1 after import, restore uniqueness check, can improve efficiency of import. If your app uses autocommit, it is recommended that you execute set autocommit=0 before importing, turn off autocommit, set autocommit=1 after import, turn on autocommit, or in

1 --generate a random table2 --CREATE table Scott. One_million as (3 SELECTROWNUM ast_id,4TRUNC (Dbms_random. VALUE (0, -)) Age,5DECODE (Dbms_random. STRING (0,1),6 'A',7 'Zhang',8 'B',9 'Week',Ten 'C', One 'Li', A 'D', - 'Zhao', - 'E', the 'Ann', - 'F', - 'Wang Xiao', - 'Small')|| +DECODE (Dbms_random. STRING (0,1)

; StaticString GetData () {Connection Dbcon=NULL; SimpleDateFormat DF=NewSimpleDateFormat ("Yyyy-mm-dd HH:mm:ss"); Try{Dbcon=mssqlconnection ();//OutputStream out = new FileOutputStream ("D:/1.exe");Statement st =dbcon.createstatement (); ResultSet RS= St.executequery ("select * from files where f_id = ' F7453B56-92F2-4AA9-8781-6CA85AB3F0CE '"); while(Rs.next ()) {Java.io.InputStream fi=rs.getbinarystream ("F_content"); File File=NewFile ("D:/1.zip"); FileOutputStream fo=Newfileoutputstream (fi

Label:Inserting data into a table using the Insert SELECT -- Add the data inserted in T1 to T2 (the T2 table must exist, and the order, data type must be consistent with T1) INSERT into T2 (Username,password) SELECT from T1 Use SELECT into to add data from an existing table to a new table -- Add the data that is queried in T1 to T2 (the T2 table cannot exist.) will be created in execution) SELECT t1_username, T1_password into from T1 To insert an identity column: -- when

--The first of these cases1 if the field of 2 tables is consistent and you want to insert all the data, you can use this method:INSERT into target table SELECT * from source table;2 "For example, to insert the articles table into the Newarticles table, it is:INSERT into Newarticles SELECT * from articles;3 If you want to import only the specified fields, you can use this method:INSERT into Target table (field 1, Field 2, ...) SELECT Field 1, Field 2, ... From source table;--Here's the second cas

--Establish table test1CREATE TABLE TEST1(ID VARCHAR2 (+) default Sys_guid (),Tdate VARCHAR2 (200))Tablespace App_tx_dataPctfree 10Pctused 40Initrans 1Maxtrans 255Storage(Initial 64KMinextents 1Maxextents Unlimited);--Insert Date time Format dataINSERT into test1 values (Sys_guid (), sysdate+10);--Querying dataSELECT * FROM Test1--tdate value is January-July-15--q: How do I brush an existing data January-July-15 format into a normal YYYYMMDD format?Update Test1 t Set t.tdate = ' 20 ' | | substr

Label: 1 require"Database.php"; 2 3 $po _code= "Ymwf2015-6-25-1"; 4 $customer= "Youmei"; 5 $confirm _date= "2015-6-25"; 6 $delivery _date= "2015-7-25"; 7 8 $create _order_sql= "INSERT into ' ld_crm '. ' Order ' (' id ', ' po_code ', ' Customer ', ' confirm_date ', ' delivery_date ') VALUES (NULL, '$po _code‘, ‘$customer‘, ‘$confirm _date‘, ‘$delivery _date‘)";Note the previousThe ' Ld_crm ' is not a single quote but a sign of the key below the ESC. Variables in the following values cannot use

This article will introduce iBATIS batch data insertion to the database. I hope this article will help you. Using callback interfaces in the iBATIS framework also enables batch data operations to reduce the number of accesses to the database and improve performance. The following is an example of batch data insertion into an Oracle database using the iBATIS framework: Batch Data insertion: The Code is as follows: Copy code /*** Ibatis