I have a query where I am using CASE statement inside DISTINCT ON like this: SELECT DISTINCT ON(COALESCE(users.cuid,events.uid), CASE WHEN events.props->>'prop' IS NULL THEN '$none' WHEN events.props->>'prop' = '' THEN '$none' ELSE events.props->>'prop' END) COALESCE(users.cuid...
<?php $db = new PDO('pgsql:host=localhost'); $statement = $db->prepare("SELECT datname FROM pg_database"); $statement->execute(); while ($row = $statement->fetch()) { echo "<p>" . htmlspecialchars($row["datname"]) . "</p>\n"; } ?> ...
DECLARE No NUMBER; Name VARCHAR2(20); BEGIN DBMS_UTILITY.EXEC_DDL_STATEMENT(' CREATE OR REPLACE VIEW myview AS SELECT empno, ename, ''E'' type FROM emp UNION SELECT dept.deptno, dname, ''D'' FROM dept '); -- 创建INSTEAD OF 触发器trigger3; DBMS_UTILITY.EXEC_DDL_STATEMENT(' CREATE...
8 Postgres nested if in case query 1 pseudo IF/Case help 28 PostgreSQL CASE usage in functions 0 SQL if statement to fix issue 0 PostgreSQL, CASE WHEN and IF 2 adding condition when case statement is true in postgresql 1 with if/else column value, select different table and colu...
7. -- 如果在这里没有指定是行级还是语句级触发器,默认就是 FOR EACH STATEMENT 8.begin 9. if to_char(sysdate,'DAY','nls_date_language=AMERICAN') 10. in('SAT','SUN') then 11. case 12. -- 当触发事件是Insert操作时,该条件谓词返回值为True,否则为False ...
条件语句，是程序中根据条件是否成立进行选择执行的一类语句，这类语句在实际使用中，难点在于如何准确的...
"); if (i < numParams - 1) { inClause.append(","); } } sql += inClause.toString() + ")"; // 创建PreparedStatement对象 PreparedStatement pstmt = conn.prepareStatement(sql); // 设置参数值 for (int i = 1; i <= numParams; i++) { pstmt.setInt(i, i); // 假设参数...
# Select if setup uses endpoints (default), or configmaps to manage leader (DCS=k8s) # kubernetes_use_configmaps: false # min number of instances in Postgres cluster. -1 = no limit min_instances:-1 # max number of instances in Postgres cluster. -1 = no limit ...
If you have @0@ already installed, see meson-logs/meson-log.txt for details on the failure. It is possible the compiler isn't looking in the proper directory. Use -Dreadline=disabled to disable readline support.'''.format(readline_dep)) ...
Context Cache, if enabled, current query result will be cached on session and be used by next same statement on the same session. sess := engine.NewSession() defer sess.Close() var context = xorm.NewMemoryContextCache() var c2 ContextGetStruct has, err := sess.ID(1).ContextCache(conte...