oracle update

can submit one or multiple rows to avoid table lock **/ -- If mod (city_cur % rowcount, 10000) = 0 then -- Dbms_output.put_line ('----'); -- Commit; -- End if; End loop; End; 5) a special case of associated update and further exploration of performanceIn oracle's update statement syntax, in addition to the update table, it can also be a view, so there is

a.slid=b.fi_inst)Set Blzt=ft_lstate;(3) Merge Update method (faster when associating fields with non-primary keys)Grammar:MERGE into table_name alias 1USING (Table|view|sub_query) alias 2On (Join condition)When matched thenUPDATESET Col1=col_val1,Col2=col_val2When isn't matched thenINSERT (column_list) VALUES (column_values);Scenario: Select data in Alias2, each with the ALIAS1 on (join condition) comparison, if matched,

Common Oracle SQL statements (1) preliminary understanding of insert delete update (DML) 1. INSERT (statement for inserting records INTO the data table) www.2cto.com A. INSERT data INTO the table: insert into Table Name (field name 1, field name 2 ,......) VALUES (value 1, value 2 ,......); B. INSERT data from a table to another table: INSERT INTO Table Name (field name 1, field name 2 ,......) SELECT (fiel

Wly 3 004 Jcj 60 005 Wss 60 006 Xsm 60 007 Lcf 60 008 Wjy 35 009 Hyf 35 010 Hwl 12 The requirements are as follows: In order of name, update the first 5 age of 100 years, how to do.First of all, MSSQL.1 --Scenario 1 failed2

thinking about it, Oracle does not seem to have provided the update operation for the two tables, and the preceding statement is also input. Oracle Reports an error and the error message is as follows: SQL> update test, test1 set test. salary = test1.salary where test. id = test1.id;

Oracle uses merge to update or insert data (Summary) under Java code summary. Using merge is much faster than traditional first judgment and then selecting insert or update. 1) The main function is to UPDATE and insert data to the database table conditionally. If this row exists, perform an

Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the implementation process is recorded here. There are two constraints in Oracle: latency constraint and non-latency constraint. The so-called non-Delay Constraint means that when a record is changed, it will immediately check the

at a time.The actual SQL used is:Update table1 s Set s.yesterday = (select yesterday from Table1_back sb where sb.tagname = s.tagname and rownum = 1) where S.tagname = (select TagName from Table1_back sb where sb.tagname = S.tagname);Update table1 s Set s.yesterday = (select yesterday from Table1_back sb where sb.tagname = s.tagname and rownum = 1) where Exists (select 1 from table1_back sb where sb.tagname = S.tagname);Reference source link : 525891

(SELECT ID from B);(2) Multi-columnUPDATE Order_rollupSET (Qty,price) = (SELECT sum (qty), SUM (price) from Order_lines WHERE customer_id= ' KOHL ')WHERE cust_id= ' KOHL ' and order_period=to_date (' 01-oct-2000 ')SourceUpdate "shop_goods_date_copy" copy set (Hotel_info_name,HOTEL_BODY_ID,up_down_status,hotel_id) = (SELECTHotel_info_name,Sghi. HOTEL_BODY_ID,Up_down_status,SGHB. hotel_idFrom Shop_goods_hotel_info SghiLeft JOIN (SELECTHOTEL_BODY_ID,hotel_idFrom Shop_goods_hotel_b) SGHB on Sghi. H

tmp_cust_city b where b.customer_id=a.customer_id)Returns the case of excess 1, the following error is reported:SQL Code01427 00000 " Single-row subquery returns more than one row " // *cause: // *action:A comparatively simple approximation to irresponsible practice isSQL CodeUpdate customers A-- using the alias set city_name= (selectfromwhere b.customer_id=a.customer_id and rownum=1)How to understand the 01427 error, in a very complex multi-table connection

How Oracle can update newly inserted data with trigger implementationCreate or Replace Trigger Tr_nameBefore insertOn tableFor each rowBegin: New. A field = ' newly value ';EndModify a field of a table of data AA (this field is specified), after saving the data in a table of the other field BB will be based on a function of the AA field value after processing updateCreate or Replace Trigger BF_ZJ_UPDATEZJMA

First look at our data: SQL> select count (1) from dave where cust_tel like '2013 '; COUNT (1) ---------- 2723 In our Dave table, cust_tel had 0551 records starting with 2723. Now we have changed these records to 0556. Let's test it using the following method: SQL> select * from v $ version; BANNER ---------------------------------------------------------------------- Oracle Database 11g Enterprise EditionRelease 11.2.0.1.0-Production PL/SQL Rele

Flashback_transaction_query where table_name like ' emp% ' where commit_timestamp 3, if the 2nd part of the above is not queried, you can first check the current employee table of the amount of data so as to be compared with no update before the comparison Select COUNT (*) from employee 4. A new table can be produced to back up the flashback data before the update (this also depends on the database flash

The following article describes how to update multiple fields with conditions in Oracle multi-Table Association, if you are a beginner in Oracle multi-table join update with multiple fields with actual conditions, you can use the following articles to better understand how to use the correct method for updating multipl

In table update operations, in many cases, data other than the table to be updated must be referenced in the expression. Like SQL Server provides the update from clause, it can connect the table to be updated with other data sources. Although only one table can be updated, by connecting the table to be updated with other data sources, you can reference data other than the table to be updated in the

the underlying base tables directly. 6) Another common Oracle Error3) For some reason, tmp_cust_city mermer_id is not the unique index/primary key.Update MERs a -- use an aliasSet city_name = (select B. city_name from tmp_cust_city B where B. customer_id = a. customer_id)Where exists (select 1From tmp_cust_city BWhere B. customer_id = a. customer_id)When a given a. mermer_id(Select B. city_name from tmp_cust_city B where B. customer_id = a. customer_

, employee names, and department information. Now, can the connection view be updated using DML statements? This depends on whether it meets certain conditions. Condition 1: The Order by sorting statement cannot be found in the connection view. If you want to change the department of an employee in the preceding view, consider whether the Order by sorting statement is used in the query statement that generates the view. If this sort statement is available, DML operations on the view will not be

Tags: alter development sel data Deb by recording select Oracle Plsql has encountered a plsql when running update or delete, or is causing the code to run out of SQL when it dies. Encountered in the development of this problem, the original SQL copied out, run in Plsql, the SQL itself is spelled correctly, but there is the case of Plsql card death, In the code, where you run SQL, you break the point debug a

Someone in the group asked: how does table A (id,name) Table B (item_id,name,a_id) in Oracle now conform to a. Name=b. The ID of the a table of name is updated to a_id in table BI say this: Update B set a_id=a.id from a inner join B on a.name=b.nameThen the elder brother executed, has been reported ORA-00933, later only know that Oracle does not have

Update: Tanku Updates Needless to say, the two are the same, mainly talking about the update of multiple tables Copy Code code as follows: Oracle> Oracle's multiple-table update requirements are more stringent, so sometimes it's not very good to write, we can try Orac