dml

问题 I develop an project using JPA along with Hibernate and I have two threads: Thread A: is always reading and outputs the differences Thread B: has some write operations and one transaction which is committed after finishing writing data If I delete data or insert new data from/in the database, after committing transactions from Thread B, in Thread A I see the differences, that some data was removed or added. My problem is when I update existing data: after committing, Thread A doesn't see the

问题 I am looking for some advice on what type of update would be the best in a certain scenario for t-sql DML. came into a data issue where end dates are one day before the start date on a current record, and need to set the end date to the start date of the next in row for multiple entities For example rowid entity id record_type start_date end_date 214 250 1 H 2015-01-01 2014-12-31 329 250 1 H 2015-04-25 2015-04-24 533 250 1 C 2015-11-01 NULL 11 250 2 H 2015-06-01 2014-05-29 292 250 2 H 2015-09

问题 It does not seem to be possible to schedule Queries in BigQuery that write to time partitioned and clustered target tables (using WRITE_TRUNCATE and a partition decorator): we are getting the error message: Invalid value: Incompatible table partitioning specification. Expects partitioning specification interval(type:day) clustering(siteId,channelId), but input partitioning specification is interval(type:day) I don't understand why this is happening, isn't the clustering specification just a

问题 For example : A user should not be able to perform INSERT , DELETE and UPDATE operations more than X number of times on a particular table at a given point of time, if the user performs an operation X +1 times than a trigger will be launched. 回答1: create table dbo.targetTable ( id int, colA varchar(10) ); go create or alter trigger dbo.DMLxTimes on dbo.targetTable for insert, update, delete as begin /* --old days.. IF @@ROWCOUNT > 5 begin rollback; end --*/ declare @maxrows int = 5; --maximum

问题 For example : A user should not be able to perform INSERT , DELETE and UPDATE operations more than X number of times on a particular table at a given point of time, if the user performs an operation X +1 times than a trigger will be launched. 回答1: create table dbo.targetTable ( id int, colA varchar(10) ); go create or alter trigger dbo.DMLxTimes on dbo.targetTable for insert, update, delete as begin /* --old days.. IF @@ROWCOUNT > 5 begin rollback; end --*/ declare @maxrows int = 5; --maximum

问题 For example : A user should not be able to perform INSERT , DELETE and UPDATE operations more than X number of times on a particular table at a given point of time, if the user performs an operation X +1 times than a trigger will be launched. 回答1: create table dbo.targetTable ( id int, colA varchar(10) ); go create or alter trigger dbo.DMLxTimes on dbo.targetTable for insert, update, delete as begin /* --old days.. IF @@ROWCOUNT > 5 begin rollback; end --*/ declare @maxrows int = 5; --maximum

问题 Is there a way to delete/update nested field in bigquery? Let's say I have this data wives.age wives.name name 21 angel adam 20 kale 21 victoria rossi 20 jessica or in json: {"name":"adam","wives":[{"name":"angel","age":21},{"name":"kale","age":20}]} {"name":"rossi","wives":[{"name":"victoria","age":21},{"name":"jessica","age":20}]} As you can see from the data above. Adam has 2 wives, named angel and kale. How to: Delete kale record. Update jessica to dessica I tried to google this, but can

问题 I need to do a MERGE in Oracle, but I'm stuck. In SQL Server, I always use the BY SOURCE and BY TARGET condition to check where record exists, and then take an action. I'm a little confused because I don't know how to achieve the same in PL/SQL. I need to do a MERGE on two tables ( customers and customers_stage ). If the record does not exists in the customer table - then insert. If the record exits in both - then update. If the record does not exists in customers_stage - then delete. In SQL

问题 I would like to know is there any way to receive information in PL/SQL how many rows have been updated and how many rows have been inserted while my PL/SQL script using MERGE DML statement. Let's use Oracle example of merge described here: MERGE example This functionality is used in my function but also I'd like to log information how many rows has beed updated and how many rows have been inserted. 回答1: There is a not a built-in way to get separate insert and update counts, no. SQL%ROWCOUNT

问题 I would like to know is there any way to receive information in PL/SQL how many rows have been updated and how many rows have been inserted while my PL/SQL script using MERGE DML statement. Let's use Oracle example of merge described here: MERGE example This functionality is used in my function but also I'd like to log information how many rows has beed updated and how many rows have been inserted. 回答1: There is a not a built-in way to get separate insert and update counts, no. SQL%ROWCOUNT