大约有 3,558 项符合查询结果（耗时：0.0297秒） [XML]
How to find the mysql data directory from command line in windows
In linux I could find the mysql installation directory with the command which mysql . But I could not find any in windows. I tried echo %path% and it resulted many paths along with path to mysql bin.
...
MySQL Conditional Insert
...s, dual is a table with one row only (found originally in Oracle, now in mysql too). The logic is that the SELECT statement generates a single row of data with the required values, but only when the values are not already found.
Alternatively, look at the MERGE statement.
...
Postgresql: Scripting psql execution with password
How can I call psql so that it doesn't prompt for a password ?
15 Answers
15
...
How to get the first five character of a String
...
best alternative for LEFT function that we use in SQL Server
– vibs2006
Jan 20 at 13:04
add a comment
|
...
Lisp in the real world
...er". but in fact it's just a bunch of integrated common lisp libraries for sql connectivity and web applications. some details are available at cl-dwim project page
using that we have developed and operate a web application for the hungarian government that collect data from the local governments a...
How to get ERD diagram for an existing database?
I have a PostgreSQL database. I want to get its ERD. How can I do so?
12 Answers
12
...
How do I clear/delete the current line in terminal?
... ~/.inputrc. Also works in places like python interpreter prompts and some SQL clients
– dwurf
Oct 13 '14 at 0:12
add a comment
|
...
How to get the current date and time
... nearest millisecond.
Make sure you're using java.util.Date and not java.sql.Date -- the latter doesn't have a zero-arg constructor, and has somewhat different semantics that are the topic of an entirely different conversation. :)
...
How to print the contents of RDD?
...ork. But if you have only one node, then why are you using spark? Just use SQL awk, or Grep, or something much simpler. So I think the only valid answer is collect. If collect is to big for you and you only want a sample use take or head or simillar functions as described below.
...
How do I get a list of column names from a psycopg2 cursor?
...extras import RealDictCursor
ps_conn = psycopg2.connect(...)
ps_cursor = psql_conn.cursor(cursor_factory=RealDictCursor)
ps_cursor.execute('select 1 as col_a, 2 as col_b')
my_record = ps_cursor.fetchone()
print (my_record['col_a'],my_record['col_b'])
>> 1, 2
...