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SQL stands for structured query language. It uses commands such as "select", "insert", "update", "delete". Some common relational database management systems that use SQL are: Oracle, MySQL, Microsoft SQL Server, PostgreSQL, etc.

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glkappe
glkappe commented Dec 31, 2021

lightning v5.3.0

After the content in parquet may be written by spark, the definition of bool is true or false. Regenerating the parquet file takes time, In tidb, bool behaves as tinyint, so proper type conversion will help improve the success rate of lightning import

parquet file:
![image](https://user-images.githubusercontent.com/21033020/147809823-214dcb34-0e10-4566-aa75-2109c0525144

dbeaver
KOLANICH
KOLANICH commented Jan 11, 2019

Sometimes it is needed to store compressed data in the DB. Unfortunately not all the DBs have built-in compression and FUSE compressed FSes are not available for every OS. So it may make sense to store compressed binary blobs in the DB.

Unfortunately when one sees them in DBeaver he sees them compressed, but often they are needed uncompressed. So it'd be nice to have a feature to decompress the

cockroach
cube.js
leogodin217
leogodin217 commented Sep 17, 2021

Describe the bug
Using a time dimension on a runningTotal measure on Snowflake mixes quoted and unquoted columns in the query. This fails the query, because Snowflake has specific rules about quoted columns. Specifically:

  • All unquoted column names are treated as upper case
  • Quoted column names are case sensitive.

So "date_from" <> date_from

To Reproduce
Steps to reproduce

gasparakos
gasparakos commented Feb 16, 2022

Can't use 'Comment' as column alias.
To reproduce:

$ dolt version
dolt version 0.37.0
$ dolt init
$ dolt sql
Dolt>  SELECT TABLE_COMMENT AS Comment FROM information_schema.TABLES;
Error parsing SQL
syntax error at position 32 near 'Comment'
SELECT TABLE_COMMENT AS Comment FROM information_schema.TABLES
                                ^
Dolt> 
questdb
pveentjer
pveentjer commented Feb 13, 2022

Describe the bug

The following problem has a problem with long overflow:

 while (true) {
            long deadline = System.nanoTime() + nanos;
            LockSupport.parkNanos(nanos);

            if (System.nanoTime() < deadline) {
                // this could be spurious wakeup, ignore if count is non-zero
                if (getCount() == 0) {
                    return
immudb
zaza81
zaza81 commented Oct 19, 2021
  • Missing information on how to create other databases
  • Missing information on how to switch to other databases
  • When using time travel, we don’t know where to get the transaction number from - we should show this to the user after committing data (this may be a missing capability in immudb / tools).
  • The last long query example in the quick start is incorrect (incorrect

This repository contains all the DSA (Data-Structures, Algorithms, 450 DSA by Love Babbar Bhaiya, FAANG Questions), Technical Subjects (OS + DBMS + SQL + CN + OOPs) Theory+Questions, FAANG Interview questions, and Miscellaneous Stuff (Programming MCQs, Puzzles, Aptitude, Reasoning). The Programming languages used for demonstration are C++, Python, and Java.

  • Updated Feb 19, 2022
  • Jupyter Notebook

Created by Donald D. Chamberlin, Raymond F. Boyce

Released 1986

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