要排除varchar_field包含任何给定字符串的所有行，请执行以下操作：
1、LIKE'Mc%' 将搜索以字母 Mc 开头的所有字符串(如 McBadden)。 2、LIKE'%inger' 将搜索以字母 inger 结尾的所有字符串(如 Ringer、Stringer)。 3、LIKE'%en%' 将搜索在任何位置包含字母 en 的所有字符串(如 Bennet、Green、McBadden)。 4、LIKE'_heryl' 将搜索以字母 heryl 结尾的所有六个字母的名...
例:SELECT NUM FROM A WHERE NUM IN(SELECT NUM FROM B) 用下面的语句替换:SELECT NUM FROM A WHERE EXISTS(SELECT 1 FROM B WHERE NUM=A.NUM) SELECT SUM(T1.C1) FROM T1 WHERE(SELECT COUNT(*)FROM T2 WHERE T2.C2=T1.C2>0) 用下面的语句替换:SELECT SUM(T1.C1) FROM T1WHERE EXISTS(SELECT ...
postgresql 複製 -- show shards to psql only (hide in other clients, like pgAdmin) SET citus.show_shards_for_app_name_prefixes TO 'psql'; -- also accepts a comma separated list SET citus.show_shards_for_app_name_prefixes TO 'psql,pg_dump'; ...
Add support to complex resources of PostgreSQL, like data types, array associations, and auxiliary statements (CTE) - GitHub - crashtech/torque-postgresql: Add support to complex resources of PostgreSQL, like data types, array associations, and auxiliary
pg_repack was initially released as a drop-in replacement for pg_reorg, addressing some of the shortcomings of the last pg_reorg version (such as support for PostgreSQL 9.2 and EXTENSION packaging) and known bugs. pg_repack 1.2 introduces further new features (parallel index builds, ability to...
Index Columns for `LIKE` in PostgreSQLMay 20, 2016 Recently I wanted to add basic text search to an application I as working on. It took me a while to figure out the right way to index columns for LIKE lookups, especially for indexing compound columns. Here’s how I did it. ...
那里您 [translate] a顾客边和饮料 正在翻译,请等待... [translate] aStarting with PostgreSQL version 8.4, one can also use the new WITH statement for defining the view in-line, like the following: 开始以PostgreSQL版本8.4,你可能为定义看法也使用新以声明线型,象以下: [translate] ...
PostgreSQL provides three different ways to perform pattern matching: the LIKE operator, the ILIKE operator, and the regular expression operator (~). In this article, we will focus on the differences between the LIKE and ILIKE operators, and how to use them effectively. What is the LIKE operat...
I want to connect to PostgreSQL database which is created with LATIN1 encoding when I try to connect to it using PostgreSQL connector I get an error conversion between UTF8 and LATIN1 is not supported. If I use Other Databases (JDBC) connector I can connect, but in this connector, Init...